HD64F3437TF16 Datasheet, PDF (242/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

10.1.4 Register Configuration
The PWM timer module has three registers for each channel as listed in table 10.2.
Table 10.2 PWM Timer Registers
Name
Abbreviation
R/W
Timer control register TCR
R/W
Duty register
DTR
R/W
Timer counter
TCNT
R/W
Initial
Value
H'38
H'FF
H'00
Address
PWM0
PWM1
H'FFA0
H'FFA4
H'FFA1
H'FFA5
H'FFA2
H'FFA6
10.2 Register Descriptions
10.2.1 Timer Counter (TCNT)
Bit
7
6
5
4
3
2
1
0
Initial value
0
0
0
0
0
0
0
0
Read/Write R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
TCNT is an 8-bit readable/writable up-counter. When the output enable bit (OE) is set to 1 in
TCR, TCNT starts counting pulses of an internal clock source selected by clock select bits 2 to 0
(CKS2 to CKS0). After counting from H'00 to H'F9, the count repeats from H'00. When TCNT
changes from H'00 to to H'01, the PWM output is placed in the 1 state, unless the DTR value is
H'00, in which case the duty cycle is 0% and the PWM output remains in the 0 state.
TCNT is initialized to H'00 at a reset and in the standby modes, and when the OE bit is cleared to
0.
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