参数资料
型号: P89LPC9251FDH
厂商: NXP SEMICONDUCTORS
元件分类: 微控制器/微处理器
英文描述: 8-bit microcontroller with accelerated two-clock 80C51 core 2 kB-4 kB-8 kB 3 V byte-erasable flash with 8-bit ADC
中文描述: MICROCONTROLLER, PDSO20
封装: 4.40 MM, PLASTIC, MO-153, SOT360-1, TSSOP-20
文件页数: 17/75页
文件大小: 1612K
代理商: P89LPC9251FDH
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P89LPC9201/921
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8-
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ADC
[1]
All ports are in input only (high-impedance) state after power-up.
[2]
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.
[3]
The RSTSRC register reflects the cause of the P89LPC9241/9251 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]
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.
[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]
The only reset sources that affect these SFRs are power-on reset and watchdog reset.
CLKCON register reset value comes from UCFG1 and UCFG2. The reset value of CLKCON.2 to CLKCON.0 come from UCFG1.2 to UCFG1.0 and reset value of CLKDBL bit
comes from UCFG2.7
SP
Stack pointer
81H
07
0000 0111
TAMOD
Timer 0 and 1
auxiliary mode
8FH
-
T1M2
-
T0M2
00
xxx0 xxx0
Bit address
8F
8E
8D
8C
8B
8A
89
88
TCON*
Timer 0 and 1
control
88H
TF1
TR1
TF0
TR0
IE1
IT1
IE0
IT0
00
0000 0000
TH0
Timer 0 high
8CH
00
0000 0000
TH1
Timer 1 high
8DH
00
0000 0000
TL0
Timer 0 low
8AH
00
0000 0000
TL1
Timer 1 low
8BH
00
0000 0000
TMOD
Timer 0 and 1
mode
89H
T1GATE
T1C/T
T1M1
T1M0
T0GATE
T0C/T
T0M1
T0M0
00
0000 0000
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 6.
Special function registers - P89LPC9241/9251 …continued
* indicates SFRs that are bit addressable.
Name
Description
SFR
addr.
Bit functions and addresses
Reset value
MSB
LSB
Hex
Binary
相关PDF资料
PDF描述
P89LPC924FDH 8-bit microcontrollers with accelerated two-clock 80C51 core 4 kB-8 kB 3 V low-power Flash with 8-bit A-D converter
P89LPC925FDH 8-bit microcontrollers with accelerated two-clock 80C51 core 4 kB-8 kB 3 V low-power Flash with 8-bit A-D converter
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