UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 120

• Manufacturer Part Number: UPD78F9222MC(T)-5A4-A
• Description: 8BIT MCU, 4K FLASH, 256B RAM, 78F9222
• Manufacturer: NEC

Specifications of UPD78F9222MC(T)-5A4-A

• Controller Family/series: UPD78
• No. Of I/o's: 17
• Ram Memory Size: 256Byte
• Cpu Speed: 10MHz
• No. Of Timers: 4
• No. Of: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

120
(12) One-shot pulse output with external trigger
(13) Operation of OVF00 flag
<1> Do not input the external trigger again while the one-shot pulse is output. To output the one-shot pulse
<2> Do not set the 16-bit timer capture/compare registers 000 and 010 (CR000 and CR010) to 0000H.
<1> The OVF00 flag is also set to 1 in the following case.
<2> Even if the OVF00 flag is cleared before the next count clock is counted (before TM00 becomes 0001H)
again, wait until the current one-shot pulse output is completed.
Either of the clear & start mode entered on a match between TM00 and CR000, clear & start at the valid
edge of the TI000 pin, or free-running mode is selected.
When TM00 is counted up from FFFFH to 0000H.
after the occurrence of a TM00 overflow, the OVF00 flag is re-set newly and clear is disabled.
CR000 is set to FFFFH.
↓
↓
Count clock
INTTM000
OVF00
CR000
TM00
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
Figure 6-37. Operation Timing of OVF00 Flag
FFFEH
FFFFH
User’s Manual U16898EJ5V0UD
FFFFH
0000H
0001H