IDSTS 

         
Name: Internal DMAC Status Register
Size: 32 bits
Address Offset: 0x8C
Read/Write access: read/write
Module Instance Base Address Register Address
i_sdmmc_sdmmc_block 0xFF808000 0xFF80808C

Size: 32

Offset: 0x8C

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

Reserved

FSM

RO 0x0

15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0

FSM

RO 0x0

EB

RO 0x0

AIS

RW 0x0

NIS

RW 0x0

Reserved

CES

RW 0x0

DU

RW 0x0

Reserved

FBE

RW 0x0

RI

RW 0x0

TI

RW 0x0

IDSTS Fields

Bit Name Description Access Reset
16:13 FSM 
DMAC FSM present state.
                                                 0  DMA_IDLE
                                                 1  DMA_SUSPEND
                                                 2  DESC_RD
                                                 3  DESC_CHK
                                                 4  DMA_RD_REQ_WAIT
                                                 5  DMA_WR_REQ_WAIT
                                                 6  DMA_RD
                                                 7  DMA_WR
                                                 8  DESC_CLOSE
                                                 This bit is read-only.
 RO 0x0
12:10 EB 
Error Bits. Indicates the type of error that caused a Bus Error. 
Valid only with Fatal Bus
Error bitIDSTS[2] set. This field does not generate an interrupt.
                                                 3’b001  Host Abort received during transmission
                                                 3’b010  Host Abort received during reception
                                                 Others: Reserved
                                                 EB is read-only.
 RO 0x0
9 AIS 
Abnormal Interrupt Summary. Logical OR of the following:
                                                 ■ IDSTS[2]-Fatal Bus Interrupt
                                                 ■ IDSTS[4]-DU bit Interrupt
                                                 Only unmasked bits affect this bit.
This is a sticky bit and must be cleared each time a corresponding bit that causes AIS
to be set is cleared. Writing a 1 clears this bit.
Value Description
0x0 A abnormal interrupt Summary is set
0x1 Writing a 1 clears this bit
RW 0x0
8 NIS 
Normal Interrupt Summary. Logical OR of the following:
                                                 ■ IDSTS[0]-Transmit Interrupt
                                                 ■ IDSTS[1]-Receive Interrupt
Only unmasked bits affect this bit.
This is a sticky bit and must be cleared each time a corresponding bit that causes NIS
to be set is cleared. Writing a 1 clears this bit.
Value Description
0x0 A normal interrupt Summary is set
0x1 Writing a 1 clears this bit
RW 0x0
5 CES 
Card Error Summary. Indicates the status of the transaction to/from the card; also present in RINTSTS. Indicates the logical OR of the following bits:
                                                 ■ EBE  End Bit Error
                                                 ■ RTO  Response Timeout/Boot Ack Timeout
                                                 ■ RCRC  Response CRC
                                                 ■ SBE  Start Bit Error
                                                 ■ DRTO  Data Read Timeout/BDS timeout
                                                 ■ DCRC  Data CRC for Receive
                                                 ■ RE  Response Error
                                                 Writing a 1 clears this bit.
The abort condition of the IDMAC depends on the setting of this CES bit. If the CES bit
is enabled, then the IDMAC aborts on a “response error”; however, it will not abort if the
CES bit is cleared.
Value Description
0x0 Card Error Summary is set
0x1 Writing a 1 clears this bit
RW 0x0
4 DU 
Descriptor Unavailable Interrupt. This bit is set when the descriptor is unavailable due to OWN bit = 0 (DES0[31] =0). Writing a 1 clears this bit.
Value Description
0x0 Descriptor Unavailable Interrupt is set
0x1 Writing a 1 clears this bit
RW 0x0
2 FBE 
Fatal Bus Error Interrupt. Indicates that a Bus Error occurred (IDSTS[12:10]). When this bit is set, the DMA disables all its bus accesses. Writing a 1 clears this bit.
Value Description
0x0 Fatal Bus Error Interrupt is set
0x1 Writing a 1 clears this bit
RW 0x0
1 RI 
Receive Interrupt. Indicates the completion of data reception for a descriptor. Writing a 1 clears this bit.
Value Description
0x0 Receive Interrupt is set
0x1 Writing a 1 clears this bit
RW 0x0
0 TI 
Transmit Interrupt. Indicates that data transmission is finished for a descriptor. Writing a ‘1’ clears this bit.
Value Description
0x0 Transmit Interrupt is set
0x1 Writing a 1 clears this bit
RW 0x0