p89v51rb2 NXP Semiconductors, p89v51rb2 Datasheet - Page 13

• Manufacturer Part Number: p89v51rb2
• Description: 8-bit 80c51 5 V Low Power 16/32/64 Kb Flash Microcontroller With 1 Kb Ram
• Manufacturer: NXP Semiconductors

Table 4.
* indicates SFRs that are bit addressable
[1]
Name
SADDR
SADEN
SPCTL
SPCFG
SPDAT
SP
TCON*
T2CON*
T2MOD
TH0
TH1
TH2
TL0
TL1
TL2
TMOD
WDTC
WDTD
Unimplemented bits in SFRs (labeled ’-’) are ‘X’s (unknown) at all times. Unless otherwise specified, ‘1’s should not be written to these bits since they may be used for other
purposes in future derivatives. The reset values shown for these bits are ‘0’s although they are unknown when read.
Special function registers
Description
Serial Port Address Register
Serial Port Address Enable
SPI Control Register
SPI Configuration Register
SPI Data
Stack Pointer
Timer Control Register
Timer2 Control Register
Timer2 Mode Control
Timer 0 HIGH
Timer 1 HIGH
Timer 2 HIGH
Timer 0 LOW
Timer 1 LOW
Timer 2 LOW
Timer 0 and 1 Mode
Watchdog Timer Control
Watchdog Timer Data/Reload
…continued
Bit address
Bit address
Bit address
SFR
address
CDH
CCH
A9H
B9H
D5H
AAH
C8H
C9H
8CH
8DH
8AH
8BH
C0H
86H
81H
88H
89H
85H
GATE
MSB
SPIE
SPIF
87
TF1
TF2
CF
8F
-
-
[1]
SPWCOL
SPEN
EXF2
86
TR1
C/T
CE
8E
-
-
[1]
DORD
RCLK
ENT2
85
TF0
CD
M1
8D
-
-
[1]
Bit functions and addresses
WDOUT
MSTR
TCLK
84
TR0
CC
M0
8C
-
[1]
EXEN2
WDRE
CPOL
GATE
83
IE1
CB
8B
-
[1]
WDTS
CPHA
82
TR2
C/T
IT1
CA
8A
-
[1]
SPR1
T2OE
WDT
C/T2
81
IE0
M1
C9
89
-
[1]
CP/RL2
SWDT
DCEN
SPR0
LSB
80
IT0
M0
88
C8
-
[1]