Referring to the Comportable guideline for peripheral device functionality, the module i2c has the following hardware interfaces defined
- Primary Clock:
clk_i
- Other Clocks: none
- Bus Device Interfaces (TL-UL):
tl
- Bus Host Interfaces (TL-UL): none
| Pin name | Direction | Description |
|---|
| sda | inout | Serial input data bit |
| scl | inout | Serial input clock bit |
| Port Name | Package::Struct | Type | Act | Width | Description |
|---|
| tl | tlul_pkg::tl | req_rsp | rsp | 1 | |
| Interrupt Name | Type | Description |
|---|
| fmt_threshold | Event | host mode interrupt: raised when the FMT FIFO depth is less than the low threshold. |
| rx_threshold | Event | host mode interrupt: raised if the RX FIFO is greater than the high threshold. |
| fmt_overflow | Event | host mode interrupt: raised if the FMT FIFO has overflowed. |
| rx_overflow | Event | host mode interrupt: raised if the RX FIFO has overflowed. |
| nak | Event | host mode interrupt: raised if there is no ACK in response to an address or data write |
| scl_interference | Event | host mode interrupt: raised if the SCL line drops early (not supported without clock synchronization). |
| sda_interference | Event | host mode interrupt: raised if the SDA line goes low when host is trying to assert high |
| stretch_timeout | Event | host mode interrupt: raised if target stretches the clock beyond the allowed timeout period |
| sda_unstable | Event | host mode interrupt: raised if the target does not assert a constant value of SDA during transmission. |
| cmd_complete | Event | host and target mode interrupt. In host mode, raised if the host issues a repeated START or terminates the transaction by issuing STOP. In target mode, raised if the external host issues a STOP or repeated START. |
| tx_stretch | Status | target mode interrupt: raised if the target is stretching clocks for a read command. This is a level status interrupt. |
| tx_overflow | Event | target mode interrupt: raised if TX FIFO has overflowed. |
| acq_full | Status | target mode interrupt: raised if ACQ FIFO becomes full. This is a level status interrupt. |
| unexp_stop | Event | target mode interrupt: raised if STOP is received without a preceding NACK during an external host read. |
| host_timeout | Event | target mode interrupt: raised if the host stops sending the clock during an ongoing transaction. |
| Alert Name | Description |
|---|
| fatal_fault | This fatal alert is triggered when a fatal TL-UL bus integrity fault is detected. |
| Countermeasure ID | Description |
|---|
| I2C.BUS.INTEGRITY | End-to-end bus integrity scheme. |