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Hitachi H8/300L Series Manual page 88

Single-chip microcomputer
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Peripheral Functions
Timer G
Function: Timer G is an 8-bit timer that has dedicated input capture functions for both the
rising and falling edges of pulses input to the input capture pin.
Features: • The timer G clock can be selected from four internal clock frequencies; ø/64,
ø/32, ø/2048, ø/2, and ø
• Provides dedicated input capture functions for both rising and falling edges.
• Two types of counter overflow are detected.
• A counter clear operation can be specified.
• Interrupts: One input capture interrupt and one overflow interrupt.
• Built-in noise exclusion circuit (5 ø, or less)
Block Diagram
System
clock ø
ø
/2
W
Noise
TMIG
exclusion
circuit
NCS
<Notation>
TMG:
Timer mode register G
TCG:
Timer counter G
ICRGF:
Input capture register GF
ICRGR:
Input capture register GR
IRRTG:
Timer G interrupt request flag
NCS:
Noise canceler select
/2.
W
Prescaler S
Edge
detection
circuit
TMG
Level sense
circuit
ICRGF
TCG
ICRGR
88
IRRTG

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