IC_FS_SCL_LCNT

         Name: Fast Mode or Fast Mode Plus I2C Clock SCL Low Count Register
Size: 16 bits
Address Offset: 0x20
Read/Write Access: Read/Write
Dependencies: This register is not applicable  when IC_ULTRA_FAST_MODE=1

Module Instance	Base Address	Register Address
`i_i2c_emac_0_DW_apb_i2c_addr_block1`	`0xFFC02A00`	`0xFFC02A20`
`i_i2c_emac_1_DW_apb_i2c_addr_block1`	`0xFFC02B00`	`0xFFC02B20`
`i_i2c_emac_2_DW_apb_i2c_addr_block1`	`0xFFC02C00`	`0xFFC02C20`

Size: 32

Offset: 0x20

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
`RSVD_IC_FS_SCL_LCNT` `RO 0x0`
15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
`IC_FS_SCL_LCNT` `RW 0xA3`

IC_FS_SCL_LCNT Fields

Bit	Name	Description	Access	Reset
31:16	`RSVD_IC_FS_SCL_LCNT`	Reserved bits - Read Only	`RO`	`0x0`
15:0	`IC_FS_SCL_LCNT`	This register must be set before any I2C bus transaction can take place to ensure proper I/O timing. This register sets the SCL clock low period count for fast speed. It is used in high-speed mode to send the Master Code and START BYTE or General CALL. This register goes away and becomes read-only returning 0s if IC_MAX_SPEED_MODE = standard. This register can be written only when the I2C interface is disabled, which corresponds to the IC_ENABLE[0] register being set to 0. Writes at other times have no effect. The minimum valid value is 8; hardware prevents values less than this being written, and if attempted results in 8 being set. For designs with APB_DATA_WIDTH = 8 the order of programming is important to ensure the correct operation of the DW_apb_i2c. The lower byte must be programmed first. Then the upper byte is programmed. If the value is less than 8 then the count value gets changed to 8. When the configuration parameter IC_HC_COUNT_VALUES is set to 1, this register is read only. Reset value: IC_FS_SCL_LOW_COUNT configuration parameter	`RW`	`0xA3`

Bit

Name

Description

Access

Reset

31:16

RSVD_IC_FS_SCL_LCNT

Reserved bits - Read Only

RO

0x0

15:0

IC_FS_SCL_LCNT

This register must be set before any I2C bus transaction can take place to
ensure proper I/O timing. This register sets the SCL clock low period count
for fast speed. It is used in high-speed mode to send the Master Code and
START BYTE or General CALL. 
This register goes away and becomes read-only returning 0s if
IC_MAX_SPEED_MODE = standard.
This register can be written only when the I2C interface is disabled, which
corresponds to the IC_ENABLE[0] register being set to 0. Writes at other times
have no effect.
The minimum valid value is 8; hardware prevents values less than this
being written, and if attempted results in 8 being set. For designs with
APB_DATA_WIDTH = 8 the order of programming is important to ensure
the correct operation of the DW_apb_i2c. The lower byte must be
programmed first. Then the upper byte is programmed. If the value is less
than 8 then the count value gets changed to 8.
When the configuration parameter IC_HC_COUNT_VALUES is set to 1,
this register is read only.
Reset value: IC_FS_SCL_LOW_COUNT configuration parameter

RW

0xA3