UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 138

• 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

8.4
8.4.1
generated and 8-bit timer counter H1 is cleared to 00H.
CMP11 register is not detected even if the CMP11 register is set, timer output is not affected.
is output from TOH1.
(1) Usage
138
TMHMD1
When 8-bit timer counter H1 and compare register 01 (CMP01) match, an interrupt request signal (INTTMH1) is
Compare register 11 (CMP11) is not used in interval timer mode. Since a match of 8-bit timer counter H1 and the
By setting bit 0 (TOEN1) of timer H mode register 1 (TMHMD1) to 1, a square wave of any frequency (duty = 50%)
Generates the INTTMH1 signal repeatedly at the same interval.
<1> Set each register.
<2> Count operation starts when TMHE1 = 1.
<3> When the values of 8-bit timer counter H1 and the CMP01 register match, the INTTMH1 signal is generated
<4> Subsequently, the INTTMH1 signal is generated at the same interval. To stop the count operation, clear
Operation of 8-bit Timer H1
Operation as interval timer/square-wave output
(i)
(ii) CMP01 register setting
and 8-bit timer counter H1 is cleared to 00H.
TMHE1 to 0.
TMHE1
0
Setting timer H mode register 1 (TMHMD1)
• Compare value (N)
Figure 8-6. Register Setting During Interval Timer/Square-Wave Output Operation
CKS12
0/1
CKS11
Interval time = (N +1)/f
0/1
CKS10
0/1
CHAPTER 8 8-BIT TIMER H1
User’s Manual U16898EJ5V0UD
TMMD11
0
CNT
TMMD10 TOLEV1
0
0/1
TOEN1
0/1
Timer output setting
Timer output level inversion setting
Interval timer mode setting
Count clock (f
Count operation stopped
CNT
) selection