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STANDARD AND PTS INTERRUPTS
PI_PEND
Address:
Reset State:
1FBEH
AAH
When hardware detects a pending peripheral or timer interrupt, it sets the corresponding bit in the
interrupt pending (INT_PEND or INT_PEND1) registers and the peripheral interrupt pending
(PI_PEND) register. When the vector is taken, the hardware clears the INT_PEND/INT_PEND1
pending bit. Reading this register clears all the PI_PEND bits. Software can generate an interrupt by
setting a PI_PEND bit.
7 0
8XC196MC
———WG —OVRTM2 — OVRTM1
7 0
8XC196MD
— COMP5 —WG —OVRTM2 — OVRTM1
7 0
8XC196MH
—SP1—SP0 —OVRTM2 — OVRTM1
Bit
Number
Bit
Mnemonic
Function
7, 5, 3, 1 — Reserved. These bits are undefined.
6 — (MC) Reserved. This bit is undefined.
COMP5 (MD) EPA Compare Channel 5
When set, this bit indicates a pending EPA compare channel 5 interrupt.
The EPA compare channel 5 and the waveform generator interrupts are
associated with the peripheral interrupt (PI). Setting INT_MASK1.5
enables PI. Setting PI_MASK.6 enables COMP5.
SP1 (MH) Serial Port 1 Error
When set, this bit indicates a pending serial port 1 error interrupt.
The serial port 1 and 0 error interrupts are associated with the serial port
interrupt (SPI). Setting INT_MASK1.4 enables SPI. Setting PI_MASK.6
enables SP1.
4 WG (MC, MD) Waveform Generator
When set, this bit indicates a pending waveform generator interrupt.
The waveform generator and the EPA compare channel 5 interrupts are
associated with the peripheral interrupt (PI). Setting INT_MASK1.5
enables PI. Setting PI_MASK.5 enables WG.
SP0 (MH) Serial Port 0 Error
When set, this bit indicates a pending serial port 0 error interrupt.
The serial port 0 and 1 error interrupts are associated with the serial port
interrupt (SPI). Setting INT_MASK1.4 enables SPI. Setting PI_MASK.4
enables SP0.
Figure 5-12. Peripheral Interrupt Pending (PI_PEND) Register