h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 341

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

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 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.
Address
Status flag
Interrupt
request
signal
Address
Write signal
Status flag
Interrupt
request
signal
φ
φ
Figure 10.43 Timing for Status Flag Clearing by DTC Activation
Figure 10.42 Timing for Status Flag Clearing by CPU
TSR write cycle
Source address
T1
T1
TSR address
read cycle
DTC
T2
T2
Rev. 2.00 Dec. 05, 2005 Page 303 of 724
Section 10 16-Bit Timer Pulse Unit (TPU)
T1
write cycle
Destination
address
DTC
T2
REJ09B0200-0200