參數(shù)資料
型號: COP885BC
廠商: National Semiconductor Corporation
英文描述: 8-Bit CMOS ROM Based Microcontrollers with 2k Memory, Comparators, and CAN Interface(8位基于CMOS ROM帶2K存儲器,比較器和CAN接口的微控制器)
中文描述: 8位的CMOS基于ROM與2K內(nèi)存,比較器和CAN接口(8位基于ROM的帶2K的CMOS存儲器,比較器和CAN微控制器接口的微控制器)
文件頁數(shù): 17/57頁
文件大小: 677K
代理商: COP885BC
Timers
(Continued)
PWM Control Register (PWMCON) (Address X’00A2)
Reserved
ESEL
PWPND
PWIE
PWMD
PWON
PWEN1
PWEN0
Bit 7
The PWMCON Register Bits are:
Reserved This bit is reserved and must be zero.
ESEL
Edge select bit, “1” for falling edge, “0” for rising
edge.
PWPND
PWM interrupt pending bit.
PWIE
PWM interrupt enable bit.
PWMD
PWM Mode bit, “1” for PWM mode, “0” for fre-
quency monitor mode.
PWON
PWM start Bit, “1” to start timer, “0” to stop timer.
Bit 0
PWEN1
Note:
The associated bits in the configuration and data register of the I/O-
port have to be setup as outputs and/or inputs in addition to setting the
PWEN bits.
PWEN0
Enable PWM0 output/input function on I/O port.
Enable PWM1 output function on I/O port.
PWM Mode
The PWM timer can generate PWM signals at frequencies
up to 39 kHz (
@
t
= 1 μs) with a resolution of 255 parts.
Lower PWM frequencies can be programmed via the pres-
caler.
If the PWM mode bit (PWMD) in the PWM configuration reg-
ister (PWMCON) is set to “1” the timer operates in PWM
mode. In this mode, the timer generates a PWM signal with
DS012067-12
FIGURE 12. PWM Timer Capture Mode Block Diagram
DS012067-13
FIGURE 13. PWM Timer PWM Mode Block Diagram
C
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17
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