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Hitachi H8/300L Series Manual page 89

Single-chip microcomputer
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Timer V
Function: Timer V is an 8-bit timer that has, in addition to a timer counter, a timer constant
register, and can output an arbitrary duty pulse based on a compare match signal
generated when these registers match.
Features: • The timer V clock can be selected from six internal clock frequencies (ø/128,
ø/64, ø/32, ø/16, ø/8, and ø/4) and an external clock. (It can also be taken from
external event input.)
• A counter clear operation can be specified.
• Interrupts: two compare match interrupts and one overflow interrupt.
• Counter operation can be started according to an external trigger input.
Block Diagram
External clock
TMCIV
<Notation>
TCORA:
TCORB:
TCNTV:
TCSRV:
TCRV0 and TCRV1:
TRGE:
Clock selection
Compare match A
TMOV
TMRIV
Compare match B
Control
logic
Timer constant register A
Timer constant register B
Timer counter V
Timer control/status registers V0 and V1
Timer control registers V0 and V1
TRGV input enable
Internal clocks
ø/4
ø/8
ø/16
S
ø/32
F/F
ø/64
Q
R
ø/128
Clock
TCORA
Comparator A
Overflow
TCNTV
Clear
Comparator B
TCORB
CMIA
CMIB
Interrupt requests
OVI
89
Peripheral Functions
TRGV
Rising edge
Falling edge
enable
enable
Trigger
TCSRV
TCRV0
TCRV1

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