HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 393

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 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 is
activated, the flag is cleared automatically. Figure 9.42 shows the timing for status flag clearing by
the CPU, and figure 9.43 shows the timing for status flag clearing by the DTC.
Address
Status flag
Interrupt
request
signal
Address
Write signal
Status flag
Interrupt
request
signal
Figure 9.43 Timing for Status Flag Clearing by DTC Activation
Figure 9.42 Timing for Status Flag Clearing by CPU
TSR write cycle
Source address
T1
TSR address
T1
read cycle
DTC
T2
T2
Rev.3.00 Mar. 26, 2007 Page 351 of 772
Section 9 16-Bit Timer Pulse Unit (TPU)
T1
write cycle
Destination
address
DTC
T2
REJ09B0355-0300