HD643303x Hitachi, HD643303x Datasheet - Page 276
HD643303x
Manufacturer Part Number
HD643303x
Description
Hitachi Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD643303X.pdf
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Contention between General Register Write and Input Capture: If an input capture signal
occurs in the T
the general register is not performed. See figure 8-68.
Note on Waveform Period Setting: When a counter is cleared by compare match, the counter is
cleared in the last state at which the TCNT value matches the general register value, at the time
when this value would normally be updated to the next count. The actual counter frequency is
therefore given by the following formula:
f =
(f: counter frequency. ø: system clock frequency. N: value set in general register.)
Figure 8-68 Contention between General Register Write and Input Capture
(N + 1)
ø
ø
Address
Internal write signal
Input capture signal
TCNT
GR
3
state of a general register write cycle, input capture takes priority and the write to
General register write cycle
T
1
261
GR address
T
2
M
T
3
M
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