HD643303x Hitachi, HD643303x Datasheet - Page 208

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

Bits 3 and 2—Reserved: Read-only bits, 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
0
1
Bit 0—Output Level Select 3 (OLS3): Selects output levels in complementary PWM mode and
reset-synchronized PWM mode.
Bit 0
OLS3
0
1
8.2.7 Timer Counters (TCNT)
TCNT is a 16-bit counter. The ITU has five TCNTs, one for each channel.
Channel
0
1
2
3
4
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).
Bit
Initial value
Read/Write
TIOCA3, TIOCA4, and TIOCB4 outputs are inverted
TIOCA3, TIOCA4, and TIOCB4 outputs are not inverted
TIOCB3, TOCXA4, and TOCXB4 outputs are inverted
TIOCB3, TOCXA4, and TOCXB4 outputs are not inverted
Description
Description
Abbreviation
TCNT0
TCNT1
TCNT2
TCNT3
TCNT4
R/W
15
0
R/W
14
0
R/W
13
0
Function
Up-counter
Phase counting mode: up/down-counter
Other modes: up-counter
Complementary PWM mode: up/down-counter
Other modes: up-counter
R/W
12
0
R/W
11
0
R/W
10
0
R/W
193
9
0
R/W
8
0
R/W
7
0
R/W
6
0
R/W
5
0
R/W
4
0
R/W
3
0
R/W
2
0
(Initial value)
(Initial value)
R/W
1
0
R/W
0
0