D12320VF25V Datasheet, PDF (1002/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Appendix B Internal I/O Registers
TCR4—Timer Control Register 4
H'FE90
TPU4
Bit
:
Initial value :
Read/Write :
7
6
5
4
3
2
1
0
⎯ CCLR1 CCLR0 CKEG1 CKEG0 TPSC2 TPSC1 TPSC0
0
0
0
0
0
0
0
0
⎯
R/W R/W R/W R/W R/W R/W R/W
Timer Prescaler
0 0 0 Internal clock: counts on φ/1
1 Internal clock: counts on φ/4
1 0 Internal clock: counts on φ/16
1 Internal clock: counts on φ/64
1 0 0 External clock: counts on TCLKA pin input
1 External clock: counts on TCLKC pin input
1 0 Internal clock: counts on φ/1024
1 Counts on TCNT5 overflow/underflow
Clock Edge
Note: This setting is ignored when channel 4 is in phase
counting mode.
0 0 Count at rising edge
1 Count at falling edge
1 ⎯ Count at both edges
Counter Clear
Note:
This setting is ignored when channel
4 is in phase counting mode.
The internal clock edge selection is
valid when the input clock is φ/4 or
slower. This setting is ignored
if φ/1 or overflow/underflow on
another channel is selected as the
input clock.
0 0 TCNT clearing disabled
1 TCNT cleared by TGRA compare match/input capture
1 0 TCNT cleared by TGRB compare match/input capture
1 _{TCNT cleared by counter clearing for another channel}
performing synchronous clearing/synchronous operation*
Note: * Synchronous operation setting is performed by setting
the SYNC bit in TSYR to 1.
Rev.7.00 Feb. 14, 2007 page 968 of 1108
REJ09B0089-0700