III PERIPHERAL BLOCK: INPUT/OUTPUT PORTS

RP3–RP0: Port input 3–0 IDMA request (D[3:0]) /

Port input 0–3, high-speed DMA, 16-bit timer 0 IDMA request register (0x40290) RP7–RP4: Port input 7–4 IDMA request (D[7:4]) /

Serial I/F Ch.1, A/D, Port input 4–7 IDMA request register (0x40293)

Specifies whether to invoke IDMA when an interrupt factor occurs.

When using the set-only method (default)

Write "1": IDMA request

Write "0": Not changed

Read: Valid

When using the read/write method

Write "1": IDMA request

Write "0": Interrupt request

Read: Valid

RP7 to RP0 are IDMA request bits corresponding to the port-input 7 to 0 interrupts, respectively. If the bit is set to "1", IDMA is invoked when an interrupt factor occurs, thereby performing a programmed data transfer. If the bit is set to "0", normal interrupt processing is performed, without invoking IDMA.

For details on IDMA, refer to "IDMA (Intelligent DMA)". At initial reset, RP is set to "0" (interrupt request).

DEP3–DEP0: Port input 3–0 IDMA enable (D[3:0]) /

Port input 0–3, high-speed DMA, 16-bit timer 0 IDMA enable register (0x40294) DEP7–DEP4: Port input 7–4 IDMA enable (D[7:4]) /

Serial I/F Ch.1, A/D, Port input 4–7 IDMA enable register (0x40297)

Enables IDMA transfer by means of an interrupt factor.

When using the set-only method (default)

Write "1": IDMA enabled

Write "0": Not changed

Read: Valid

When using the read/write method

Write "1": IDMA enabled

Write "0": IDMA disabled

Read: Valid

If DEP is set to "1", the IDMA request by the interrupt factor is enabled. If the register bit is set to "0", the IDMA request is disabled.

After an initial reset, DEP is set to "0" (IDMA disabled).

B-III-9-24

EPSON

S1C33L03 FUNCTION PART