P89LPC913 PHILIPS [NXP Semiconductors], P89LPC913 Datasheet - Page 25

• Manufacturer Part Number: P89LPC913
• Description: 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM
• Manufacturer: PHILIPS [NXP Semiconductors]

Table 9:
* indicates SFRs that are bit addressable.
[1]
[2]
[3]
[4]
[5]
[6]
Name
SADEN
SBUF
SCON
SSTAT
SP
SPCTL
SPSTAT
SPDAT
TAMOD
TCON*
TH0
TH1
TL0
TL1
TMOD
TRIM
WDCON
WDL
WFEED1
WFEED2
All ports are in input only (high impedance) state after power-up.
BRGR1 and BRGR0 must only be written if BRGEN in BRGCON SFR is ‘0’. If any of them is written if BRGEN = 1, result is unpredictable.
The RSTSRC register reflects the cause of the P89LPC912 reset. Upon a power-up reset, all reset source flags are cleared except POF and BOF; the power-on reset value is
xx110000.
After reset, the value is 111001x1, i.e., PRE2-PRE0 are all ‘1’, WDRUN = 1 and WDCLK = 1. WDTOF bit is ‘1’ after Watchdog reset and is ‘0’ after power-on reset. Other resets will
not affect WDTOF.
On power-on reset, the TRIM SFR is initialized with a factory preprogrammed value. Other resets will not cause initialization of the TRIM register.
The only reset source that affects these SFRs is power-on reset.
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
P89LPC914 Special function registers
Description
Serial port address enable
Serial port data buffer register
Serial port control
Serial port extended status
register
Stack pointer
SPI control register
SPI status register
SPI data register
Timer 0 and 1 auxiliary mode
Timer 0 and 1 control
Timer 0 high
Timer 1 high
Timer 0 low
Timer 1 low
Timer 0 and 1 mode
Internal oscillator trim register
Watchdog control register
Watchdog load
Watchdog feed 1
Watchdog feed 2
Bit address
Bit address
SFR
addr.
BAH DBMOD
8CH
8DH
C1H
C2H
C3H
B9H
99H
98H
81H
E2H
E1H
E3H
8FH
88H
8AH
8BH
89H
96H
A7H
SM0/FE
…continued
PRE2
SSIG
MSB
SPIF
TF1
9F
8F
-
-
-
INTLO
WCOL
SPEN
PRE1
SM1
TR1
9E
8E
-
-
-
TRIM.5
DORD
CIDIS
T1M1
PRE0
SM2
TF0
9D
8D
-
-
Bit functions and addresses
DBISEL
TRIM.4
MSTR
T1M0
REN
TR0
9C
8C
-
-
-
T0GATE
TRIM.3
CPOL
TB8
9B
FE
8B
-
-
-
-
WDRUN
TRIM.2
CPHA
T0C/T
RB8
BR
9A
8A
-
-
-
WDTOF
TRIM.1
SPR1
T0M1
OE
99
89
TI
-
-
-
WDCLK
TRIM.0
STINT
SPR0
T0M2
T0M0
LSB
98
88
RI
-
-
Reset value
Hex
00
xx
00
00
07
04
00
00
00
00
00
00
00
00
00
[5] [6]
[4] [6]
FF
Binary
00000000
xxxxxxxx
00000000
00000000
00000111
00000100
00xxxxxx
00000000
xxx0xxx0
00000000
00000000
00000000
00000000
00000000
00000000
11111111