UPD75206CW NEC [NEC], UPD75206CW Datasheet - Page 19

• Manufacturer Part Number: UPD75206CW
• Description: 4-BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC [NEC]

5.6
generator. The timer/pulse generator has the following functions.
Note
f
(Set to "1")
X
Frequency
Divider
The PD75206 incorporates one channel of timer/pulse generator which can be used as a timer or a pulse
TPGM3
TPGM1
TIMER/PULSE GENERATOR
1/2
If the STOP mode is set while the timer/pulse generator is in operation, miss-operation may result.
(a) Functions available in the timer mode
(b) Functions available in the PWM pulse generate mode
If pulse output is not necessary, the PPO pin can be used as a 1-bit output port.
To prevent that from occurring, preset the timer/pulse generator to the stop state using its mode
register.
8-bit interval timer operation (IRQTPG generation) enabling the clock source to be varied at 5 levels
Square wave output to PPO pin
14-bit accuracy PWM pulse output to the PPO pin (Used as a digital-to-analog converter and
applicable to tuning)
Fixed time interval (
Fig. 5-5 Block Diagram of Timer/Pulse Generator (Timer Mode)
Prescalar Select Latch (5)
Modulo Register L (8)
8
2
f
XX
15
Clear
= 7.81 ms : at 4.19 MHz operation) interrupt generation
MODL
Internal Bus
CP
Modulo Register L (8)
Modulo Latch H (8)
Count Register (8)
Comparator (8)
8
8
8
Clear
Match
MODH
T F/F
Set
TPGM4TPGM5 TPGM7
Selector
INTTPG
IRQTPG
Set Signal
Output Buffer
PD75206
PPO
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