Timer Counters (Tcnt) - Hitachi H8/3022 Hardware Manual

Bits 3 and 2—Reserved: These bits cannot be modified and are always read as 1.
Bit 1—Output Level Select 4 (OLS4): Selects output levels in complementary PWM mode and
reset-synchronized PWM mode.
Bit 1
OLS4 Description
0 TIOCA , TIOCA
3
1 TIOCA , TIOCA
3
Bit 0—Output Level Select 3 (OLS3): Selects output levels in complementary PWM mode and
reset-synchronized PWM mode.
Bit 0
OLS3 Description
0 TIOCB , TOCXA
3
1 TIOCB , TOCXA
3

8.2.7 Timer Counters (TCNT)

TCNT is a 16-bit counter. The ITU has five TCNTs, one for each channel.
Chanel Abbreviation
0 TCNT0
1 TCNT1
2 TCNT2
3 TCNT3
4 TCNT4
Bit 15
Initial value 0
Read/Write R/W
Each TCNT is a 16-bit readable/writable register that counts pulse inputs from a clock source. The
clock source is selected by bits TPSC2 to TPSC0 in the timer control register (TCR).
206
, and TIOCB pin outputs are inverted
4 4
, and TIOCB pin outputs are not inverted
4 4
, and TOCXB
4 4
, and TOCXB
4 4
Function
Up-counter
Phase counting mode: up/down-counter
Other modes: up-counter
Complementary PWM mode: up/down-counter
Other modes: up-counter
14 13 12 11
0 0 0 0
R/W R/W R/W R/W
pin outputs are inverted
pin outputs are not inverted
10 9 8 7
0 0 0 0
R/W R/W R/W R/W
6 5 4 3
0 0 0 0
R/W R/W R/W R/W
(Initial value)
(Initial value)
2 1 0
0 0 0
R/W R/W R/W