IC_SS_SCL_LCNT
Name: Standard Speed I2C Clock SCL Low Count Register
Size: 16 bits
Address Offset: 0x18
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 | 0xFFC02A18 |
i_i2c_emac_1_DW_apb_i2c_addr_block1 | 0xFFC02B00 | 0xFFC02B18 |
i_i2c_emac_2_DW_apb_i2c_addr_block1 | 0xFFC02C00 | 0xFFC02C18 |
Size: 32
Offset: 0x18
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_SS_SCL_LOW_COUNT RO 0x0 |
|||||||||||||||
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
IC_SS_SCL_LCNT RW 0x24C |
IC_SS_SCL_LCNT Fields
Bit | Name | Description | Access | Reset |
---|---|---|---|---|
31:16 | RSVD_IC_SS_SCL_LOW_COUNT |
Reserved bits - Read Only |
RO | 0x0 |
15:0 | IC_SS_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 standard speed. 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 DW_apb_i2c. The lower byte must be programmed first, and then the upper byte is programmed. When the configuration parameter IC_HC_COUNT_VALUES is set to 1, this register is read only. Reset value: IC_SS_SCL_LOW_COUNT configuration parameter |
RW | 0x24C |