参数资料
型号: P89LPC972FN,129
厂商: NXP Semiconductors
文件页数: 9/66页
文件大小: 0K
描述: MCU 80C51 8KB FLASH 20DIP
标准包装: 18
系列: LPC900
核心处理器: 8051
芯体尺寸: 8-位
速度: 18MHz
连通性: I²C,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 18
程序存储器容量: 8KB(8K x 8)
程序存储器类型: 闪存
RAM 容量: 256 x 8
电压 - 电源 (Vcc/Vdd): 2.4 V ~ 5.5 V
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 20-DIP(0.300",7.62mm)
包装: 管件
其它名称: 568-8749-5
P89LPC972FN,129-ND
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[1]
BRGR1 and BRGR0 must only be written if BRGEN in BRGCON SFR is logic 0. If any are written while BRGEN = 1, the result is unpredictable.
[2]
All ports are in input only (high-impedance) state after power-up.
[3]
The RSTSRC register reflects the cause of the P89LPC970/971/972 reset except BOIF bit. Upon a power-up reset, all reset source flags are cleared except POF and BOF; the
power-on reset value is x011 0000.
[4]
The only reset sources that affect these SFRs are power-on reset and watchdog reset.
[5]
On power-on reset and watchdog reset, the TRIM SFR is initialized with a factory preprogrammed value. Other resets will not cause initialization of the TRIM register.
[6]
After reset, the value is 1110 01x1, i.e., PRE2 to PRE0 are all logic 1, WDRUN = 1 and WDCLK = 1. WDTOF bit is logic 1 after watchdog reset and is logic 0 after power-on reset.
Other resets will not affect WDTOF.
TH4
Timer/Counter 4
high byte
CCH
00
0000 000
0
TL4
Timer/Counter 4
low byte
CBH
00
0000 0000
TINTF
Timer/Counters
2/3/4 overflow
and external
flags
CEH
-
TF4
EXF4
TF3
EXF3
TF2
EXF2
00
0000 000
0
TRIM
Internal
oscillator trim
register
96H
RCCLK
ENCLK
TRIM.5
TRIM.4
TRIM.3
TRIM.2
TRIM.1
TRIM.0
WDCON
Watchdog
control register
A7H
PRE2
PRE1
PRE0
-
WDRUN
WDTOF
WDCLK
WDL
Watchdog load
C1H
FF
1111 1111
WFEED1 Watchdog
feed 1
C2H
WFEED2 Watchdog
feed 2
C3H
Table 4.
Special function registers …continued
* indicates SFRs that are bit addressable.
Name
Description
SFR
addr.
Bit functions and addresses
Reset value
MSB
LSB
Hex
Binary
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