HD6432621 Hitachi, HD6432621 Datasheet - Page 458
HD6432621
Manufacturer Part Number
HD6432621
Description
(HD64F262x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432621.pdf
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12.4
During interval timer mode operation, an overflow generates an interval timer interrupt (WOVI).
The interval timer interrupt is requested whenever the OVF flag is set to 1 in TCSR. OVF must be
cleared to 0 in the interrupt handling routine.
If an NMI request has been chosen in the watchdog timer mode, an NMI request is generated
when a TCNT overflow occurs.
12.5
12.5.1
If a timer counter clock pulse is generated during the T
takes priority and the timer counter is not incremented. Figure 12-8 shows this operation.
414
Interrupts
Usage Notes
Contention between Timer Counter (TCNT) Write and Increment
ø
Address
Internal write signal
TCNT input clock
TCNT
Figure 12-8 Contention between TCNT Write and Increment
TCNT write cycle
T
1
N
2
T
state of a TCNT write cycle, the write
2
Counter write data
M
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