HD64F3437TF16 Datasheet, PDF (219/752 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.

9.1.2 Block Diagram
Figure 9.1 shows a block diagram of one channel in the 8-bit timer module.
External
clock source
TMCI
Internal
clock sources
Channel 0
ø_P/2
ø_P/8
ø_P/32
ø_P/64
ø_P/256
ø_P/1024
Channel 1
ø_P/2
ø_P/8
ø_P/64
ø_P/128
ø_P/1024
ø_P/2048
Clock select
Clock
TCORA
TMO
TMRI
Compare-match A
Overflow
Clear
Control
logic
Compare-match B
Comparator A
TCNT
Comparator B
TCORB
TCSR
CMIA
CMIB
OVI
Interrupt signals
TCR
TCR: Timer control register (8 bits)
TCSR: Timer control status register (8 bits)
TCORA: Time constant register A (8 bits)
TCORB: Time constant register B (8 bits)
TCNT: Timer counter
Figure 9.1 Block Diagram of 8-Bit Timer (1 Channel)
Internal
data bus
190