UPD78361A Datasheet, PDF (41/88 Pages) NEC – 16/8-BIT SINGLE-CHIP MICROCONTROLLER

µPD78361A, 78362A
3.10 PWM UNIT
The µPD78362A is provided with two lines that output 8-/9-/10-/12-bit resolution variable PWM signals. The
PWM output can be used as a digital-to-analog conversion output by connecting an external lowpass filter, and
ideal for controlling actuators such as motors.
An output of between 244 Hz and 62.5 kHz can be obtaind, depending on the combination of the count clock
(62.5 ns to 1 µs) and counter bit length (8, 9, 10, or 12) (at an internal clock frequency of 16 MHz).
Figure 3-18. Block Diagram of PWM Unit
f CLK
fCLK/2
fCLK/4
fCLK/8
fCLK/16
Counter (12)
Comparator (12)
7
8
9 _Overflow
11
ALVn
0-7
0-8
0-9 ^Coinci-
dence
0-11
SQ
R
PWMn
Compare register CMPn (12)
PWM buffer register n (12)
Remark n = 0, 1
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