p89c669 NXP Semiconductors, p89c669 Datasheet - Page 16

• Manufacturer Part Number: p89c669
• Description: P89c669 80c51 8-bit Microcontroller Family With Extended Memory; 96 Kb Flash With 2 Kb Ram
• Manufacturer: NXP Semiconductors

Table 5:
[1]
[2]
[3]
[4]
[5]
[6]
Name
S1ADEN
S1STAT
SP
SPE
TCON
T2CON
T2MOD
TH0
TH1
TH2
TL0
TL1
TL2
TMOD
WDTRST
WDCON
SFRs are bit addressable.
SFRs are modified from or added to the 80C51 SFRs.
Extended SFRs accessed by preceding the instruction with MX escape (opcode A5h).
Power-on reset is 10H. Other reset is 00H.
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 unimplemented bits (labeled ‘-’) in the SFRs are X’s (unknown) at all times. ‘1’s should NOT be written to these bits, as 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.
[2]
[1]
[1] [2]
[2]
[2]
[2]
[2]
[2]
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Special function registers
Description
Serial Port 1 Address Enable
Serial Port 1 Status
Stack Pointer (Stack Pointer
LOW Byte)
Stack Pointer HIGH
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 Reset
Watchdog Timer Control
…continued
Bit address 8F
SFR
addr.
83H
84H
81H
FBH
88H
C8H
C9H
8CH
8DH
CDH
8AH
8BH
CCH
89H
A6H
8FH
[3]
[3]
[3]
[3]
Bit functions and addresses
MSB
DBMOD_1 INTLO_1
TF1
CF
TF2
-
GATE
-
TR1
CE
EXF2
-
C/T
-
8E
CIDIS_1
8D
TF0
CD
RCLK
-
M1
-
DBISEL1 FE_1
8C
TR0
CC
TCLK
-
M0
-
8B
IE1
CB
EXEN2
-
GATE
-
BR_1
8A
IT1
CA
TR2
-
C/T
WDPRE2 WDPRE1 WDPRE0 00H
OE_1
89
IE0
C9
C/T2
T2OE
M1
LSB
STINT_1
88
IT0
C8
CP/RL2
DCEN
M0
Reset
value
00H
00H
07H
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
00H
FFH
[6]
[6]
[6]