HD64F3437TF16 Datasheet, PDF (185/752 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.

8.1.2 Block Diagram
Figure 8.1 shows a block diagram of the free-running timer.
External
clock source
FTCI
Clock select
Internal
clock sources
ø_P/2
ø_P/8
ø_P/32
Clock
Compare-
match A
OCRA (H/L)
Comparator A
FTOA
FTOB
Overflow
Clear
Compare-
match B
FTIA
FTIB
FTIC
FTID
Control
logic
Capture
FRC (H/L)
Comparator B
OCRB (H/L)
ICRA (H/L)
ICRB (H/L)
ICRC (H/L)
ICRD (H/L)
TCSR
TIER
TCR
Internal
data bus
TOCR
ICIA
ICIB
ICIC
ICID
OCIA
OCIB
FOVI
Interrupt signals
Legend:
FRC:
Free-running counter (16 bits)
OCRA, B: Output compare register A, B (16 bits)
ICRA, B, C, D: Input capture register A, B, C, D (16 bits)
TCSR:
Timer control/status register (8 bits)
TIER: Timer interrupt enable register (8 bits)
TCR: Timer control register (8 bits)
TOCR: Timer output compare control
register (8 bits)
Figure 8.1 Block Diagram of 16-Bit Free-Running Timer
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