294
10.6.5
Contention between TCNT Write and Overflow/Underflow
If an overflow occurs in the T3 state of a TCNT write cycle, writing takes priority over counter
incrementing. OVF is set to 1. The same applies to underflows. The timing is shown in figure
10.62.
T
1
T
2
T
3
TCNT write cycle
TCNT address
H'FFFF
M
TCNT write data
CK
Address
Internal
write signal
TCNT
input clock
Overflow
signal
TCNT
OVF
Figure 10.62 Contention between TCNT Write and Overflow
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Page 525: ...490 CK RAS CAS TRp TRc TRcc tRASD1 tRASD2 tCASD3 tCASD2 TRr tCSR Figure 20 18 Self Refresh ...
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