UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 71

• Manufacturer Part Number: UPD75238GJ
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC [NEC]

4.7 TIMER/PULSE GENERATOR
(1) Timer/pulse generator functions
The PD75238 contains one channel for a timer/pulse generator that can be used as a timer or a pulse
generator. It has the following functions:
If pulse output is unnecessary, the PPO pin can be used as a 1-bit output port.
(a) Functions available when the timer/pulse generator is used in the timer mode
(b) Functions available when the timer/pulse generator is used in the PWM pulse generation mode
Caution
• 8-bit interval timer operation using one of five clock sources (occurrence of IRQTPG)
• Square wave output to the PPO pin
• PWM pulse output to the PPO pin with an accuracy of 14 bits (applicable for electronic tuning when
• Generation of interrupts at regular intervals (2
used as an D/A converter)
Note 7.81 ms at 4.19 MHz
If the timer/pulse generator is operating when the STOP mode is set, it may malfunction. So
the timer/pulse generator must be disabled with the mode register in advance.
15
/f
X
= 5.46 ms at 6.0 MHz)
Note
PD75238
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