SH7052 datasheet(434/919 Pages) RENESAS

434 / 919 page

408

Port function

selection

Upper 8 bits

of POPCR

Lower 8 bits

of POPCR

Reset signal

Set signal

APC output pins

(PULS0 to PULS7)

Compare-match

signal

Compare-match

signal

GR11B

GRIIA

Figure 11.2 Advanced Pulse Controller Output Operation

11.3.2

Advanced Pulse Controller Output Operation

Example of Setting Procedure for Advanced Pulse Controller Output Operation: Figure 11.3

shows an example of the setting procedure for advanced pulse controller output operation.

1. Set general registers GR11A and GR11B as output compare registers with the timer I/O

control register (TIOR).

2. Set the pulse rise point with GR11A and the pulse fall point with GR11B.

3. Select the timer counter 11 (TCNT11) counter clock with the timer prescale register (PSCR).

TCNT11 can only be cleared by an overflow.

4. Enable the respective interrupts with the timer interrupt enable register (TIER).

5. Set the pins for 1 output and 0 output with POPCR.

6. Set the control register for the port to be used by the APC to the APC output pin function.

7. Set the STR bit to 1 in the timer start register (TSTR) to start timer counter 11 (TCNT11).

8. Each time a compare-match interrupt is generated, update the GR value and set the next pulse

output time.

9. Each time a compare-match interrupt is generated, update the POPCR value and set the next

pin for pulse output.

SH7052 Datasheet(PDF) 434 Page - Renesas Technology Corp