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Hitachi H8/300L Series Manual page 91

Single-chip microcomputer
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Timer Y
Function: Timer Y is a 16-bit timer that is incremented by the input clock and supports two
operating modes, namely interval mode and auto-reload mode.
Features: • The timer V clock can be selected from seven internal clock frequencies
(ø/8192, ø/2048, ø/512, ø/256, ø/64, ø/16, and ø/4) and an external clock.
(It can also be taken from external event input.)
• Generates an interrupt on counter overflow.
Block Diagram
System clock ø
External event
input
<Notation>
TMY:
Timer mode register Y (8 bits)
TCY:
Timer counter Y (16 bits)
TLY:
Timer load register Y (16 bits)
IRRTY:
Timer Y overflow interrupt enable flag
Prescaler S
TMY
TCY
TLY
91
Peripheral Functions
IRRTY

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