UHS_REG

         
Name: UHS-1 Register
Size: 32 bits
Address Offset: 0x74
Read/write access: write/read

Module Instance	Base Address	Register Address
`i_sdmmc_sdmmc_block_1`	`0xFF8D1000`	`0xFF8D1074`

Size: 32

Offset: 0x74

Access: RW

Important: The value of a reserved bit must be maintained in software. When you modify registers containing reserved bit fields, you must use a read-modify-write operation to preserve state and prevent indeterminate system behavior.

Bit Fields
31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
`DDR_REG_15` `RW 0x0`	`DDR_REG_14` `RW 0x0`	`DDR_REG_13` `RW 0x0`	`DDR_REG_12` `RW 0x0`	`DDR_REG_11` `RW 0x0`	`DDR_REG_10` `RW 0x0`	`DDR_REG_9` `RW 0x0`	`DDR_REG_8` `RW 0x0`	`DDR_REG_7` `RW 0x0`	`DDR_REG_6` `RW 0x0`	`DDR_REG_5` `RW 0x0`	`DDR_REG_4` `RW 0x0`	`DDR_REG_3` `RW 0x0`	`DDR_REG_2` `RW 0x0`	`DDR_REG_1` `RW 0x0`	`DDR_REG_0` `RW 0x0`
15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
`VOLT_REG_15` `RW 0x0`	`VOLT_REG_14` `RW 0x0`	`VOLT_REG_13` `RW 0x0`	`VOLT_REG_12` `RW 0x0`	`VOLT_REG_11` `RW 0x0`	`VOLT_REG_10` `RW 0x0`	`VOLT_REG_9` `RW 0x0`	`VOLT_REG_8` `RW 0x0`	`VOLT_REG_7` `RW 0x0`	`VOLT_REG_6` `RW 0x0`	`VOLT_REG_5` `RW 0x0`	`VOLT_REG_4` `RW 0x0`	`VOLT_REG_3` `RW 0x0`	`VOLT_REG_2` `RW 0x0`	`VOLT_REG_1` `RW 0x0`	`VOLT_REG_0` `RW 0x0`

UHS_REG Fields

Bit

Name

Description

Access

Reset

DDR_REG_15

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_14

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_13

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_12

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_11

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_10

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_9

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_8

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_7

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_6

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_5

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_4

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_3

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_2

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_1

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

DDR_REG_0

DDR mode. These bits indicate DDR mode of operation to the core for the data transfer.
                                                 0  Non-DDR mode
                                                 1  DDR mode
UHS_REG [16] should be set for card number 0, UHS_REG [17] for card number 1 and so on.

Value	Description
0x0	Non DDR Mode;clear these bits in HS400 Mode
0x1	DDR Mode

RW

0x0

VOLT_REG_15

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_14

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_13

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_12

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_11

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_10

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_9

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_8

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_7

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_6

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_5

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_4

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_3

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_2

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_1

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0

VOLT_REG_0

High Voltage mode. Determines the voltage fed to the buffers by an
external voltage regulator.
                                                 0  Buffers supplied with 3.3V Vdd
                                                 1  Buffers supplied with 1.8V Vdd
These bits function as the output of the host controller and are fed to an external voltage regulator. The voltage regulator must switch the voltage of the buffers of a particular card to either 3.3V or 1.8V, depending on the
value programmed in the register.
VOLT_REG[0] should be set to 1’b1 for card number 0 in order to make it
operate for 1.8V.

Value	Description
0x0	Buffers supplied with 3.3V Vdd
0x1	Buffers supplied with 1.8V Vdd

RW

0x0