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P89LPC921 数据表(PDF) 10 Page - NXP Semiconductors

部件名 P89LPC921
功能描述  8-bit microcontrollers with two-clock 80C51 core 2 kB/4 kB/8 kB 3 V low-power Flash with 256-byte data RAM
PDF  45 Pages
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制造商  PHILIPS [NXP Semiconductors]
网页  http://www.nxp.com
标志 PHILIPS - NXP Semiconductors

P89LPC921 数据表(HTML) 10 Page - NXP Semiconductors

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Table 4:
Special function registers
* indicates SFRs that are bit addressable.
Name
Description
SFR
addr.
Bit functions and addresses
Reset value
MSB
LSB
Hex
Binary
Bit address
E7
E6
E5
E4
E3
E2
E1
E0
ACC*
Accumulator
E0H
00
00000000
AUXR1
Auxiliary function register
A2H
CLKLP
EBRR
ENT1
ENT0
SRST
0
-
DPS
00[1]
000000x0
Bit address
F7
F6
F5
F4
F3
F2
F1
F0
B*
B register
F0H
00
00000000
BRGR0[2]
Baud rate generator rate
LOW
BEH
00
00000000
BRGR1[2]
Baud rate generator rate
HIGH
BFH
00
00000000
BRGCON
Baud rate generator control
BDH
-
-
-
-
-
-
SBRGS
BRGEN
00
xxxxxx00
CMP1
Comparator 1 control register
ACH
-
-
CE1
CP1
CN1
OE1
CO1
CMF1
00[1]
xx000000
CMP2
Comparator 2 control register
ADH
-
-
CE2
CP2
CN2
OE2
CO2
CMF2
00[1]
xx000000
DIVM
CPU clock divide-by-M
control
95H
00
00000000
DPTR
Data pointer (2 bytes)
DPH
Data pointer HIGH
83H
00
00000000
DPL
Data pointer LOW
82H
00
00000000
FMADRH
Program Flash address HIGH
E7H
00
00000000
FMADRL
Program Flash address LOW
E6H
00
00000000
FMCON
Program Flash control (Read)
E4H
BUSY
-
-
-
HVA
HVE
SV
OI
70
01110000
Program Flash control (Write)
E4H
FMCMD.
7
FMCMD.
6
FMCMD.
5
FMCMD.
4
FMCMD.
3
FMCMD.
2
FMCMD.
1
FMCMD.
0
FMDATA
Program Flash data
E5H
00
00000000
I2ADR
I2C slave address register
DBH
I2ADR.6
I2ADR.5
I2ADR.4
I2ADR.3
I2ADR.2
I2ADR.1
I2ADR.0
GC
00
00000000
Bit address
DF
DE
DD
DC
DB
DA
D9
D8
I2CON*
I2C control register
D8H
-
I2EN
STA
STO
SI
AA
-
CRSEL
00
x00000x0
I2DAT
I2C data register
DAH
I2SCLH
Serial clock generator/SCL
duty cycle register HIGH
DDH
00
00000000



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