Rev. 1.00, 09/03, page 361 of 704
Contention between Buffer Register Write and Input Capture:
If the input capture signal is generated in the T2 state of a buffer register write cycle, the buffer
operation takes priority and the write to the buffer register is not performed. Figure 12.53 shows
the timing in this case.
Input capture
signal
Write signal
Address
φ
TCNT
Buffer register write cycle
T
1
T
2
N
TGR
N
M
M
Buffer
register
Buffer register
address
Figure 12.53 Contention between Buffer Register Write and Input Capture
Contention between Overflow/Underflow and Counter Clearing:
If overflow/underflow and counter clearing occur simultaneously, the TCFV/TCFU flag in TSR is
not set and TCNT clearing takes priority. Figure 12.54 shows the operation timing when a TGR
compare match is specified as the clearing source, and H'FFFF is set in TGR.
Содержание H8S/2437
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