Rev. 1.00, 09/03, page 356 of 704
Underflow
signal
TCNT
(underflow)
TCNT
input clock
H'0000
H'FFFF
TCFU flag
TCIU interrupt
φ
Figure 12.44 TCIU Interrupt Setting Timing
Status Flag Clearing Timing:
After a status flag is read as 1 by the CPU, it is cleared by writing 0 to it. Figure 12.45 shows the
timing for status flag clearing by the CPU.
T
1
T
2
TSR write cycle
TSR address
Address
Write signal
Status flag
Interrupt
request
signal
Figure 12.45 Timing for Status Flag Clearing by CPU
Summary of Contents for H8S/2437
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