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参数资料
| 型号： | P83C576EBAA |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer |
| 中文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQCC44 |
| 封装： | PLASTIC, MO-047AC, SOT-187-2, LCC-44 |
| 文件页数： | 25/46页 |
| 文件大小： | 447K |
| 代理商： | P83C576EBAA |
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Philips Semiconductors
Product specification
83C576/87C576
80C51 8-bit microcontroller family
8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators,
failure detect circuitry, watchdog timer
1998 Jun 04
25
PWMs
The pulse width modulator system of the 8XC576 contains two
PWM output channels. These channels generate pulses of
programmable length and interval. The prescaler and counter are
common to both PWM channels.
The prescaler is loaded with the complement of the PWMP register
during counter overflow, internal reset, and when EN/CLR# = 0. The
repetition frequency is defined by the 8-bit prescaler which clocks
the counter. The prescaler division factor = PWMP+1. Reading the
PWMP gives the current reload value. The actual count of the
prescaler cannot be read.
The 8-bit counter counts from 0–254 inclusive. The value of the
counter is compared to the contents of the compare registers PWM0
and PWM1. When the counter compares to the compare register,
that register’s output goes LOW. When the counter reaches zero the
output is set HIGH unless PWMn = 00H. The duty cycle of each
channel is defined by the contents of its compare register and is in
the range of 0 to 1, programmed in increments of 1/255.
The outputs can be set continuously low by loading PWMn with 00H
and continuously high by loading with FFH.
The PWM counter is enabled with bit EN/CLR# of the PWCON
register. Output to the port pin is separately enabled by setting the
PWEn bits in the PWCON register. The counter remains active if
EN/CLR# is set even if both PWEn bits are reset. The PWM function
is reset by a chip reset. In idle mode, the PWM will function as
configured by PWCON. In power-down the state of the PWM will
freeze when the internal clock stops. If the chip is awakened with an
external interrupt, the PWM will continue to function from its state
when power-down was entered. The EN/CLR# bit of PWCON will
clear the counter and load the contents of the PWMP into the
prescaler when set LOW. If PWEn is set at this time the output will
go HIGH unless PWMn is 00H.
The repetition frequency is given by:
f
PWM
f
OSC
(1
(510
PWMP))
An oscillator frequency of 12MHz results in a repetition range of
92Hz to 23.5KHz.
The high/low ratio of PWMn is PWMn/(255–PWMn) for PWMn
values except 255. A PWMn value of 255 results in a high PWMn
output.
In order for the PWMn output to be used as a standard I/O pin,
PWMn must be reset. The PWM counter can still be used as an
internal timer by setting EN/CLR#.
Pulse Width Modulator Control Register Bit Definitions
(PWCON = BCH)
PWMF
PWCON.3
Counter overflow flag,
must be cleared by software
EN/CLR
PWCON.2
Counter enable and counter/prescaler
reset when Low
PWE1
PWCON.1
PWM1 output to P2.7 pin enable
PWE0
PWCON.0
PWM0 output to P2.6 pin enable
Auxiliary Register Bit Definitions
RST AUXR.3
Software reset bit
TXI
AUXR.2
SIO TxD invert
LO
AUXR.1
Low Speed, reduces internal clock drive
AO
AUXR.0
ALE Off, when set turns off ALE
(AUXR =8EH)
Interrupt Enable 0 (IE0) Register
EA
IE0.7
Enable all interrupts
EC
IE0.6
Enable PCA interrupt
ET2
IE0.5
Enable Timer 2 interrupt
ES
IE0.4
Enable Serial I/O interrupt
ET1
IE0.3
Enable Timer 1 interrupt
EX1
IE0.2
Enable External interrupt 1
ET0
IE0.1
Enable Timer 0 interrupt
EX0
IE0.0
Enable External interrupt 0
Interrupt Enable 1 (IE1) Register
EOB
IE1.7
Enable OBE interrupt
EIB
IE1.6
Enable IBF interrupt
EAD
IE1.5
Enable ADC interrupt
EC4
IE1.4
Enable PCA module 4 interrupt
EC3
IE1.3
Enable PCA module 3 interrupt
EC2
IE1.2
Enable PCA module 2 interrupt
EC1
IE1.1
Enable PCA module 1 interrupt
EC0
IE1.0
Enable PCA module 0 interrupt
Interrupt Priority 0 (IP0) Register
IP0.7
(reserved)
PPC
IP0.6
PCA interrupt priority
PT2
IP0.5
Timer 2 interrupt priority
PS
IP0.4
Serial I/O interrupt priority
PT1
IP0.3
Timer 1 interrupt priority
PX1
IP0.2
External interrupt 1 priority
PT0
IP0.1
Timer 0 interrupt priority
PX0
IP0.0
External interrupt 0 priority
Interrupt Priority 1 (IP1) Register
POB
IP1.7
OBE interrupt priority
PIB
IP1.6
IBF interrupt priority
PAD
IP1.5
ADC interrupt priority
PC4
IP1.4
PCA module 4 interrupt priority
PC3
IP1.3
PCA module 3 interrupt priority
PC2
IP1.2
PCA module 2 interrupt priority
PC1
IP1.1
PCA module 1 interrupt priority
PC0
IP1.0
PCA module 0 interrupt priority
相关PDF资料 |
PDF描述 |
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| P83C576EHPN | 80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer |
| P87C576EHPN | 80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer |
| P83C576EBBB | 80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer |
| P87C576EBBB | 80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer |
| P87C576EBAA | 80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer |
相关代理商/技术参数 |
参数描述 |
|---|---|
| P83C576EBB | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| P83C576EBBB | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer |
| P83C576EBN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Microcontroller |
| P83C576EBP | 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller |
| P83C576EBPN | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators, failure detect circuitry, watchdog timer |
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