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Hitachi H8/300L Series Manual page 85

Single-chip microcomputer
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Timer E
Function: Timer E is an 8-bit timer that is incremented by an input clock and has two
operating modes, namely free running mode and auto-reload mode.
Features: • The timer E clock can be selected from eight internal clock frequencies
(ø/8192, ø/4096, ø/2048, ø/512, ø/256, ø/128, ø/32, and ø/8).
• Generates a counter overflow interrupt.
• Supports output of a fixed frequency 50% duty signal using the prescaler
divisor.
When ø is 5 MHz: 2.45 kHz or 4.9 kHz
When ø is 2 MHz: 0.98 kHz or 1.95 kHz
• Supports output of a 50% duty arbitrary frequency square wave signal using
either the overflow signal or the prescaler S signal.
Block Diagram
System clock ø
<Notation>
TME:
Timer mode register E
TCE:
Timer counter E
TLE:
Timer load register E
IRRTE:
Timer E overflow interrupt request flag
TME
Prescaler S
TCE
TLE
85
Peripheral Functions
IRRTE
TMO output
latch

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