UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 127

• 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

(1) 8-bit compare register 80 (CR80)
(2) 8-bit timer counter 80 (TM80)
This 8-bit register always compares its set value with the count value of 8-bit timer/counter 80 (TM80). It
generates an interrupt request signal (INTTM80) if the two values match.
CR80 is set by using an 8-bit memory manipulation instruction. A value of 00H to FFH can be set to this
register.
Reset signal generation makes the contents of this register undefined.
Caution When changing the value of CR80, be sure to stop the timer operation. If the value of CR80
This 8-bit register counts the count pulses.
The value of TM80 can be read by using an 8-bit memory manipulation instruction.
Reset signal generation clears TM80 to 00H.
Address: FFCDH
Address: FFCEH
Symbol
Symbol
CR80
TM80
is changed with the timer operation enabled, a match interrupt request signal is generated
immediately and the timer may be cleared.
Figure 7-2. Format of 8-bit Compare Register 80 (CR80)
7
7
Figure 7-3. Format of 8-bit Timer Counter 80 (TM80)
After reset: 00H
After reset: Undefined
6
6
CHAPTER 7 8-BIT TIMER 80
User’s Manual U16898EJ5V0UD
5
5
R
4
4
W
3
3
2
2
1
1
0
0
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