Datasheet

Table Of Contents
Section 10 16-Bit Timer Pulse Unit (TPU)
REJ09B0140-0900 Rev. 9.00 Page 341 of 846
Sep 16, 2010
H8S/2215 Group
Status Flag Clearing Timing: After a status flag is read as 1 by the CPU, it is cleared by writing
0 to it. When the DTC or DMAC is activated, the flag is cleared automatically. Figure 10.42
shows the timing for status flag clearing by the CPU, and figure 10.43 shows the timing for status
flag clearing by the DTC or DMAC.
T
1
T
2
TSR write cycle
TSR address
φ
Address
Write signal
Status flag
Interrupt
request
signal
Figure 10.42 Timing for Status Flag Clearing by CPU
Interrupt
request
si
g
nal
Status flag
Address
Source address
DTC/DMAC
read cycle
T
1
T
2
Destination
address
T
1
T
2
DTC/DMAC
write cycle
φ
Figure 10.43 Timing for Status Flag Clearing by DTC or DMAC Activation