37.5.6 I2CxPIR
Note:
- Enabled interrupt flags are OR’ed to produce the PIRx[I2CxIF] bit.
- ACKTIF is not set by a matching 10-bit high address byte with the R/W bit clear. It is only set after the matching low address byte is shifted in.
| Name: | I2CxPIR |
| Offset: | 0x029A |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| CNTIF | ACKTIF | WRIF | ADRIF | PCIF | RSCIF | SCIF | |||
| Access | R/W/HS | R/W/HS | R/W/HS | R/W/HS | R/W/HS | R/W/HS | R/W/HS | ||
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Bit 7 – CNTIF Byte Count Interrupt Flag(1)
| Value | Description |
|---|---|
1 |
Set on
the 9th falling SCL edge when I2CxCNT = 0 |
0 |
I2CxCNT value is not zero |
Bit 6 – ACKTIF
Acknowledge Status Time Interrupt Flag (used only when MODE = 0xx or MODE =
11x)(1,2)
| Value | Description |
|---|---|
1 |
Acknowledge sequence detected, set on the 9th falling SCL edge for any byte when addressed as a client |
0 |
Acknowledge sequence not detected |
Bit 4 – WRIF
Data Write Interrupt Flag (used only when MODE = 0xx or MODE =
11x)(1)
| Value | Description |
|---|---|
1 |
Data byte detected, set on the 8th falling SCL edge for a received data byte |
0 |
Data byte not detected |
Bit 3 – ADRIF
Address Interrupt Flag (used only when MODE = 0xx or MODE =
11x)(1)
| Value | Description |
|---|---|
1 |
Address detected, set on the 8th falling SCL edge for a matching received address byte |
0 |
Address not detected |
Bit 2 – PCIF Stop Condition Interrupt Flag(1)
| Value | Description |
|---|---|
1 |
Stop condition detected |
0 |
Stop condition not detected |
Bit 1 – RSCIF Restart Condition Interrupt Flag(1)
| Value | Description |
|---|---|
1 |
Restart condition detected |
0 |
Restart condition not detected |
Bit 0 – SCIF Start Condition Interrupt Flag(1)
| Value | Description |
|---|---|
1 |
Start condition detected |
0 |
Start condition not detected |