參數(shù)資料
型號: M34518M4-XXXSP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDIP32
封裝: 0.400 INCH, 1.78 MM PITCH, PLASTIC, SDIP-32
文件頁數(shù): 60/157頁
文件大小: 1783K
代理商: M34518M4-XXXSP
ML610Q411/ML610Q412/ML610Q415 User’s Manual
Chapter 11
PWM
11 – 1
11.
PWM
11.1
Overview
This LSI includes one channel of 16-bit PWM (Pulse Width Modulation).
The PWM output (PWM0) function is assigned to P43(Port 4) and P34(Port 3) as the tertiary function. For the
functions of port 4 and port3, see Chapter 21, “Port 4” and Chapter 20, “Port 3”.
11.1.1
Features
The PWM signals with the periods of approximately 4us (@HTBCLK) to 2s (@LSCLK) can be generated and
output outside of the LSI.
The output logic of the PWM signal can be switched to the positive or negative logic.
At the coincidence of PWM signal period, duties, and period & duty, a PWM interrupt (PW0INT) occurs.
For the PWM clock, a low-speed clock (LSCLK), a high-speed time base clock (HTBCLK), and an external clock
are available.
11.1.2
Configuration
Figure 11 - 1 shows the configuration of the PWM circuit.
PW0PL:
PWM0 period register L
PW0PH:
PWM0 period register H
PW0PBUF:
PWM0 period buffer
PW0DL:
PWM0 duty register L
PW0DH:
PWM0 duty register H
PW0DBUF:
PWM0 duty buffer
PW0CL:
PWM0 counter register L
PW0CH:
PWM0 counter register H
PW0CON0:
PWM0 control register 0
PW0CON1:
PWM0 control register 1
Figure 11-1
Configuration of PWM Circuit
PW0CH/L
16
Data bus
PW0INT
LSCLK
PW0CON0
PW0CON1
R
Period
match
Comparator
HTBCLK
External clock
P44/T02P0CK
Write PW0CL
P0CK
Write PW0CH
Comparator
Output control
circuit
P43/PWM0
or
P34/PWM0
P0NEG
Duty
match
P0FLG
16
88
8
88
8
PW0PBUF
PW0DBUF
PW0PH/L
PW0DH/L
PW0CH
latch
Read PW0CL
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