ABP I2C Slave¶

Features¶

Theory of Operation¶

Programming Model¶

APB I2C Slave CSRs¶

I2CS_DEV_ADDRESS offset = 0x000¶

Field	Bits	Type	Default	Description
RESERVED	7:7	RW		Reserved
SLAVE_ADDR	6:0	RW	0x6F	I2C Device Address

I2CS_ENABLE offset = 0x004¶

Field	Bits	Type	Default	Description
RESERVED	7:1	RW
IP_ENABLE	0:0	RW

I2CS_DEBOUNCE_LENGTH offset = 0x008¶

Field	Bits	Type	Default	Description
DEB_LEN	7:0	RW	0x14

I2CS_SCL_DELAY_LENGTH offset = 0x00C¶

Field	Bits	Type	Default	Description
SCL_DLY_LEN	7:0	RW	0x14

I2CS_SDA_DELAY_LENGTH offset = 0x010¶

Field	Bits	Type	Default	Description
SDA_DLY_LEN	7:0	RW	0x14

I2CS_MSG_I2C_APB offset = 0x040¶

Field	Bits	Type	Default	Description
I2C_TO_APB	7:0	RW	0x00

I2CS_MSG_I2C_APB_STATUS offset = 0x044¶

Field	Bits	Type	Default	Description
RESERVED	7:1	RW		Reserved
I2C_TO_APB_STATUS	0:0	RW	0x00

I2CS_MSG_APB_I2C offset = 0x048¶

Field	Bits	Type	Default	Description
APB_TO_I2C	7:0	RW	0x00

I2CS_MSG_APB_I2C_STATUS offset = 0x04C¶

Field	Bits	Type	Default	Description
RESERVED	7:1	RW		Reserved
APB_TO_I2C_STATUS	0:0	RW	0x00

I2CS_FIFO_I2C_APB_WRITE_DATA_PORT offset = 0x080¶

Field	Bits	Type	Default	Description
I2C_APB_WRITE_DATA_PORT	31:0	RW

I2CS_FIFO_I2C_APB_READ_DATA_PORT offset = 0x084¶

Field	Bits	Type	Default	Description
I2C_APB_READ_DATA_PORT	31:0	RW

I2CS_FIFO_I2C_APB_FLUSH offset = 0x088¶

Field	Bits	Type	Description
RESERVED	7:1	RW	Reserved
ENABLE	0:0	RW	Writing a 1 to this register bit will flush the I2CtoAPB FIFO,
			clearing all contents and rendering the FIFO to be empty

I2CS_FIFO_I2C_APB_WRITE_FLAGS offset = 0x08C¶

Field	Bits	Type	Default	Description
RESERVED	7:3	RW		Reserved
FLAGS	2:0	RW

I2CS_FIFO_I2C_APB_READ_FLAGS offset = 0x090¶

Field	Bits	Type	Default	Description
RESERVED	7:3	RW		Reserved
FLAGS	2:0	RW

I2CS_FIFO_APB_I2C_WRITE_DATA_PORT offset = 0x0C0¶

Field	Bits	Type	Default	Description
I2C_APB_WRITE_DATA_PORT	31:0	RW

I2CS_FIFO_APB_I2C_READ_DATA_PORT offset = 0x0C4¶

Field	Bits	Type	Default	Description
I2C_APB_READ_DATA_PORT	31:0	RW

I2CS_FIFO_APB_I2C_FLUSH offset = 0x0C8¶

Field	Bits	Type	Description
RESERVED	7:1	RW	Reserved
ENABLE	0:0	RW	Writing a 1 to this register bit will flush the APBtoI2C FIFO,
			clearing all contents and rendering the FIFO to be empty

I2CS_FIFO_APB_I2C_WRITE_FLAGS offset = 0x0CC¶

Field	Bits	Type	Default	Description
RESERVED	7:3	R		Reserved
FLAGS	2:0	R

I2CS_FIFO_APB_I2C_READ_FLAGS offset = 0x0D0¶

Field	Bits	Type	Default	Description
RESERVED	7:3	R		Reserved
FLAGS	2:0	R

I2CS_INTERRUPT_STATUS offset = 0x100¶

Field	Bits	Type	Description
RESERVED	7:3	R	Reserved
I2C_APB_FIFO_WRITE_STATUS	2:2	R
APB_I2C_FIFO_READ_STATUS	1:1	R
APB_I2C_MESSAGE_AVAILABLE	0:0	R

I2CS_INTERRUPT_ENABLE offset = 0x104¶

Field	Bits	Type	Description
RESERVED	7:3	RW	Reserved
I2C_APB_FIFO_WRITE_STATUS_INT_ENABLE	2:2	RW
APB_I2C_FIFO_READ_STATUS_INT_ENABLE	1:1	RW
APB_I2C_MESSAGE_AVAILABLE_INT_ENABLE	0:0	RW

I2CS_INTERRUPT_I2C_APB_WRITE_FLAGS_SELECT offset = 0x108¶

Field	Bits	Type
WRITE_FLAG_FULL	7:7	RW
WRITE_FLAG_1_SPACE_AVAIL	6:6	RW
WRITE_FLAG_2_3_SPACE_AVAIL	5:5	RW
WRITE_FLAG_4_7_SPACE_AVAIL	4:4	RW
WRITE_FLAG_8_31_SPACE_AVAIL	3:3	RW
WRITE_FLAG_32_63_SPACE_AVAIL	2:2	RW
WRITE_FLAG_64_127_SPACE_AVAIL	1:1	RW
WRITE_FLAG_128_SPACE_AVAIL	0:0	RW

I2CS_INTERRUPT_APB_I2C_READ_FLAGS_SELECT offset = 0x10C¶

Field	Bits	Type
READ_FLAG_128_SPACE_AVAIL	7:7	RW
READ_FLAG_64_127_SPACE_AVAIL	6:6	RW
READ_FLAG_32_63_SPACE_AVAIL	5:5	RW
READ_FLAG_8_31_SPACE_AVAIL	4:4	RW
READ_FLAG_4_7_SPACE_AVAIL	3:3	RW
READ_FLAG_2_3_SPACE_AVAIL	2:2	RW
READ_FLAG_1_SPACE_AVAIL	1:1	RW
READ_FLAG_EMPTY	0:0	RW

I2CS_INTERRUPT_TO_APB_STATUS offset = 0x140¶

Field	Bits	Type
RESERVED	7:3	RW
APB_I2C_FIFO_WRITE_STATUS	2:2	RW
I2C_APB_FIFO_READ_STATUS	1:1	RW
NEW_I2C_APB_MSG_AVAIL	0:0	RW

I2CS_INTERRUPT_TO_APB_ENABLE offset = 0x144¶

Field	Bits	Type
RESERVED	7:3	RW
APB_I2C_FIFO_WRITE_STATUS_ENABLE	2:2	RW
I2C_APB_FIFO_READ_STATUS_ENABLE	1:1	RW
NEW_I2C_APB_MSG_AVAIL_ENABLE	0:0	RW

I2CS_INTERRUPT_APB_I2C_WRITE_FLAGS_SELECT offset = 0x148¶

Field	Bits	Type
WRITE_FLAG_FULL	7:7	RW
WRITE_FLAG_1_SPACE_AVAIL	6:6	RW
WRITE_FLAG_2_3_SPACE_AVAIL	5:5	RW
WRITE_FLAG_4_7_SPACE_AVAIL	4:4	RW
WRITE_FLAG_8_31_SPACE_AVAIL	3:3	RW
WRITE_FLAG_32_63_SPACE_AVAIL	2:2	RW
WRITE_FLAG_64_127_SPACE_AVAIL	1:1	RW
WRITE_FLAG_128_SPACE_AVAIL	0:0	RW

I2CS_INTERRUPT_I2C_APB_READ_FLAGS_SELECT offset = 0x14C¶

Field	Bits	Type
READ_FLAG_128_SPACE_AVAIL	7:7	RW
READ_FLAG_64_127_SPACE_AVAIL	6:6	RW
READ_FLAG_32_63_SPACE_AVAIL	5:5	RW
READ_FLAG_8_31_SPACE_AVAIL	4:4	RW
READ_FLAG_4_7_SPACE_AVAIL	3:3	RW
READ_FLAG_2_3_SPACE_AVAIL	2:2	RW
READ_FLAG_1_SPACE_AVAIL	1:1	RW
READ_FLAG_EMPTY	0:0	RW