HD6412332 RENESAS [Renesas Technology Corp], HD6412332 Datasheet - Page 548

• Manufacturer Part Number: HD6412332
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

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 10.46
shows the timing for status flag clearing by the CPU, and figure 10.47 shows the timing for status
flag clearing by the DTC or DMAC.
Rev.4.00 Sep. 07, 2007 Page 518 of 1210
REJ09B0245-0400
φ
Address
Status flag
Interrupt
request
signal
φ
Address
Write signal
Status flag
Interrupt
request
signal
Figure 10.47 Timing for Status Flag Clearing by DTC/DMAC Activation
Figure 10.46 Timing for Status Flag Clearing by CPU
TSR write cycle
Source address
T
TSR address
DTC/DMAC
T
read cycle
1
1
T
T
2
2
DTC/DMAC
T
write cycle
Destination
1
address
T
2