HD643303x Hitachi, HD643303x Datasheet - Page 273
HD643303x
Manufacturer Part Number
HD643303x
Description
Hitachi Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD643303X.pdf
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Contention between TCNT Write and Overflow or Underflow: If an overflow occurs in the T
state of a TCNT write cycle, writing takes priority and the counter is not incremented. OVF is
set to 1.The same holds for underflow. See figure 8-65.
ø
Address
Internal write signal
TCNT input clock
Overflow signal
TCNT
OVF
Figure 8-65 Contention between TCNT Write and Overflow
T
1
TCNT write cycle
258
H'FFFF
TCNT address
TCNT write data
T
2
T
3
M
3
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