UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 210

• 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

6.4.10 Cautions for external 24-bit event counter
(1) 8-bit timer counter H2 output signal
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Note This setting is not required if input enable for the TI52 pin is not controlled.
The output level control (default value) of 8-bit timer H2 which is used to control input enable for the TI52 pin,
must be set to high level (TOLEV2 = 1). Consequently, an interrupt request signal (INTTMH2) is generated while
the input enable signal to the TI52 pin is disabled (TMH2 output: low level), and the TM52 and TM00 count values
(= external event count value in input enable period) can be read via servicing of this interrupt.
Note with caution that the input enable signal to the TI52 pin is at high level (enable status) until the TMH2 and
CMP02 register values match, after 8-bit timer H2 operation has been enabled (TMHE2 = 1) via this setting
(TOLEV2 = 1).
These operations must be restarted
since the counter is cleared when
timer operation is stopped.
TMC003 = 0, TMC002 = 0
Figure 6-56. Operation Flowchart of External 24-bit Event Counter
TCE52 = 0
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
User’s Manual U18698EJ1V0UD
Set TM52 to external event counter
Starts TMH2 count operation
Starts TM00 count operation
Starts TM52 count operation
Starts TM00 count operation
Starts TM52 count operation
Set TM00 to interval timer
Read TM00 counter value
Read TM52 counter value
Clear TM00 counter value
Clear TM52 counter value
Set TMH2 to PWM mode
Generates INTTMH2?
Note
Note
Set in this order
Perform these steps during
low-level output of TOH2