Timer I/O Control Register (Tior) - Renesas H8/3067 Series User Manual

Section 9 16-Bit Timer
Bits 2 to 0—Timer Prescaler 2 to 0 (TPSC2 to TPSC0): These bits select the counter clock
source.
Bit 2 Bit 1
TPSC2 TPSC1
0 0
1
1 0
1
When bit TPSC2 is cleared to 0 an internal clock source is selected, and the timer counts only
falling edges. When bit TPSC2 is set to 1 an external clock source is selected, and the timer counts
the edge or edges selected by bits CKEG1 and CKEG0.
When channel 2 is set to phase counting mode (MDF = 1 in TMDR), the settings of bits TPSC2 to
TPSC0 in TCR2 are ignored. Phase counting takes precedence.
9.2.10

Timer I/O Control Register (TIOR)

TIOR is an 8-bit register. The 16-bit timer has three TIORs, one in each channel.
Channel Abbreviation Function
0 TIOR0
1 TIOR1
2 TIOR2
Rev. 4.00 Jan 26, 2006 page 354 of 938
REJ09B0276-0400
Bit 0
TPSC0 Function
Internal clock: φ
0
Internal clock: φ/2
1
Internal clock: φ/4
0
Internal clock: φ/8
1
0 External clock A: TCLKA input
1 External clock B: TCLKB input
0 External clock C: TCLKC input
1 External clock D: TCLKD input
TIOR controls the general registers. Some functions differ in PWM
mode.
(Initial value)