參數(shù)資料
型號(hào)： P87LPC764
英文描述： Low power. low price. low pin count (20 pin) microcontroller with 4 kbyte OTP
中文描述： 低功耗。低廉的價(jià)格。低引腳數(shù)（20針）4字節(jié)檢察官辦公室微控制器
文件頁數(shù)： 45/56頁
文件大?。?/td> 312K
代理商： P87LPC764
Philips Semiconductors
Preliminary specification
87LPC762
Low power, low price, low pin count (20 pin)
microcontroller with 2 kbyte OTP
2001 Apr 04
42
SU01182
WATCHDOG
INTERRUPT
S
Q
20-BIT COUNTER
STATE CLOCK
WDTE (UCFG1.7)
BOD (xxx.x)
POR (xxx.x)
WATCHDOG
RESET
CLEAR
8 MSBs
8 TO 1 MUX
WATCHDOG
FEED DETECT
WDOVF
(WDCON.5)
WDS2–0
(WDCON.2–0)
WDTE + WDRUN
WDCLK * WDTE
500 kHz
R/C OSCILLATOR
ENABLE
CLOCK OUT
R
Figure 33. Block Diagram of the Watchdog Timer
BIT
WDCON.7, 6
WDCON.5
SYMBOL
—
WDOVF
FUNCTION
Reserved for future use. Should not be set to 1 by user programs.
Watchdog timer overflow flag. Set when a watchdog reset or timer overflow occurs. Cleared when
the watchdog is fed.
Watchdog run control. The watchdog timer is started when WDRUN = 1 and stopped when
WDRUN = 0. This bit is forced to 1 (watchdog running) if the WDTE configuration bit = 1.
Watchdog clock select. The watchdog timer is clocked by CPU clock/6 when WDCLK = 1 and by
the watchdog RC oscillator when WDCLK = 0. This bit is forced to 0 (using the watchdog RC
oscillator) if the WDTE configuration bit = 1.
Watchdog rate select.
Timeout Clocks
Minimum Time
Nominal Time
8,192
10 ms
16,384
20 ms
32,768
41 ms
65,536
82 ms
131,072
165 ms
262,144
330 ms
524,288
660 ms
1,048,576
1.3 sec
WDCON.4
WDRUN
WDCON.3
WDCLK
WDCON.2–0 WDS2–0
WDS2–0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Maximum Time
40 ms
80 ms
160 ms
320 ms
640 ms
1280 ms
2.60 sec
5.30 sec
25 ms
50 ms
100 ms
200 ms
400 ms
800 ms
1.60 sec
3.20 sec
WDS0
SU01476
WDS1
WDS2
WDCLK
WDRUN
WDOVF
—
—
0
1
2
3
4
5
6
7
WDCON
Reset Value: 30h for a watchdog reset.
10h for other rest sources if the watchdog is enabled via the WDTE configuration bit.
00h for other reset sources if the watchdog is disabled via the WDTE configuration bit.
Not Bit Addressable
Address: A7h
Figure 34. Watchdog Timer Control Register (WDCON)
相關(guān)PDF資料
PDF描述
P87LPC764 Low power, low price, low pin count(20 pin) microcontroller with4 kB OTP(帶4 kB OTP的低功耗，低價(jià)格，少引腳（20引腳）的微控制器)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P87LPC764BD 制造商:PHILIPS-SEMI 功能描述:
P87LPC764BD,512 功能描述:8位微控制器 -MCU 80C51 4K/128 OTP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
P87LPC764BD/01 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Low power, low price, low pin count (20 pin) microcontroller with 4 kbyte OTP
P87LPC764BD/01,529 功能描述:8位微控制器 -MCU 4K/128 OTP 2.7-6V LO PWR SO20 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
P87LPC764BD/CP3220 制造商:NXP Semiconductors 功能描述:- Rail/Tube
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