UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 206

• Manufacturer Part Number: UPD78F0413GA-GAM-AX
• Description: 8BIT UC, 32K FLASH, 1KB RAM, LCD
• Manufacturer: NEC

Specifications of UPD78F0413GA-GAM-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 30
• Ram Memory Size: 1024Byte
• Cpu Speed: 10MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 32KB
• Oscillator Type: External, Internal

6.4.9 External 24-bit event counter operation
timer/event counter 00 and 8-bit timer/event counter 52 in cascade, and using the external event counter function of 8-
bit timer/event counter 52.
pin via 8-bit timer counter 52 (TM52), and counting the signal which has been output upon a match between the TM52
count value and 8-bit timer compare register 52 (CR52 = FFH
controlled via 8-bit timer counter H2 output.
timer counter 52 (TM52). Also, input enable for TM52 external event input can be controlled via 8-bit timer counter H2
output, by setting bit 2 (ISC2) of the input switch control register (ISC) to “1”.
PRM001, and PRM000) of prescaler mode register 00 (PRM00) of 16-bit timer/event counter 00 to “1”, “1”, and “1”
(TM52 output is selected as a count clock), and bits 3 and 2 (TMC003 and TMC002) of 16-bit timer mode control
register 00 (TMC00) to “1” and “1” (count clear & start mode entered upon a match between TM00 and CR000).
TM00 is cleared to “0” and an interrupt request signal (INTTM000) is generated upon a match between the TM00
count value and 16-bit timer compare register 000 (CR000) value.
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16-bit timer/event counter 00 can be operated to function as an external 24-bit event counter, by connecting 16-bit
It operates as an external 24-bit event counter, by counting the number of external clock pulses input to the TI52
When using 16-bit timer/event counter 00 as an external 24-bit event counter, external event input enable can be
The valid edge of the input to the TI52 pin can be specified by timer clock selection register 52 (TCL52) of 8-bit
Count operation using 8-bit timer 52 output as the count clock is started, by setting bits 2, 1, and 0 (PRM002,
Subsequently, INTTM000 is generated upon every match between the TM00 and CR000 values.
Note When operating 16-bit timer/event counter 00 as an external 24-bit event counter, the 8-bit timer compare
register 52 (CR52) value must be set to FFH. Also, the TM52 interrupt request signal (INTTM52) must be
masked (TMMK52 = 1).
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
User’s Manual U18698EJ1V0UD
Note
) via 16-bit timer counter 00 (TM00).