UPD78F9222MC(T)-5A4-A NEC, UPD78F9222MC(T)-5A4-A Datasheet - Page 102

• 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

102
CR010 capture value
Note The carry flag is set to 1. Ignore this setting.
(2) Measurement of two pulse widths with free-running counter
TM00 count value
TI000 pin input
When 16-bit timer counter 00 (TM00) is operated in free-running mode, it is possible to simultaneously
measure the pulse widths of the two signals input to the TI000 pin and the TI010 pin.
Specify both the rising and falling edges as the valid edges of the TI000 and TI010 pins, by using bits 4 and 5
(ES000 and ES010) and bits 6 and 7 (ES100 and ES110) of PRM00.
When the valid edge specified by bits 4 and 5 (ES000 and ES010) of PRM00 is input to the TI000 pin, the
value of TM00 is taken into 16-bit timer capture/compare register 000 (CR010) and an interrupt request signal
(INTTM010) is set.
Also, when the valid edge specified by bits 6 and 7 (ES100 and ES110) of PRM00 is input to the TI010 pin, the
value of TM00 is taken into 16-bit timer capture/compare register 000 (CR000) and an interrupt request signal
(INTTM000) is set.
Sampling is performed using the count clock cycle selected by prescaler mode register 00 (PRM00), and a
capture operation is only performed when a valid level of the TI000 or TI010 pin is detected twice, thus
eliminating noise with a short pulse width.
INTTM010
Count clock
Figure 6-19. Configuration Diagram for Pulse Width Measurement by Free-Running Counter
Figure 6-20. Timing of Pulse Width Measurement Operation by Free-Running Counter
TI000/INTP0/P30
0000H
t
and One Capture Register (with Both Edges Specified)
f
f
XP
XP
0001H
/2
/2
f
XP
2
6
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
D0
(D1 − D0) × t
D0
User’s Manual U16898EJ5V0UD
D0 + 1
16-bit timer capture/compare
register 010 (CR010)
D1
16-bit timer/counter 00
D1
Internal bus
D1 + 1
(TM00)
(D2 − D1) × t
FFFFH
0000H
Note
INTTM010
D2
(D3 − D2) × t
D2
D3
D3