p87lpc778 NXP Semiconductors, p87lpc778 Datasheet - Page 11

• Manufacturer Part Number: p87lpc778
• Description: Cmos Single-chip 8-bit 80c51 Microcontroller 128-byte Data Ram, 8 Kb Otp
• Manufacturer: NXP Semiconductors

Table 3:
* indicates SFRs that are bit addressable.
[1]
[2]
[3]
Name
PSW*
PT0AD
SCON*
SBUF
SADDR
SADEN
SP
TCON*
TH0
TH1
TL0
TL1
TMOD
WDCON Watchdog control register
WDRST
I/O port values at reset are determined by the PRHI bit in the UCFG1 configuration byte.
The PCON reset value is xxBOF POF - 0000b. The BOF and POF flags are not affected by reset. The POF flag is set by hardware upon power up. The BOF flag is set by the
occurrence of a brownout reset/interrupt and upon power up.
The WDCON reset value is xx11 0000b for a Watchdog reset, xx01 0000b for all other reset causes if the Watchdog is enabled, and xx00 0000b for all other reset causes if the
Watchdog is disabled.
Description
Program status word
Port 0 digital input disable
Serial port control
Serial port data buffer register
Serial port address register
Serial port address enable
Stack pointer
Timer0 and 1 control
Timer0 HIGH
Timer1 HIGH
Timer0 LOW
Timer1 LOW
Timer0 and 1 mode
Watchdog reset register
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xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Special function registers
…continued
Bit address
Bit address
Bit address
addr.
SFR
D0h
A9h
B9h
8Ch
8Dh
8Ah
8Bh
A7h
A6h
F6h
98h
99h
81h
88h
89h
Bit functions and addresses
GATE
MSB
SM0
TF1
CY
D7
9F
8F
-
SM1
TR1
C/T
D6
AC
9E
8E
-
WDOVF
SM2
TF0
M1
D5
9D
8D
F0
WDRUN
REN
RS1
TR0
M0
D4
9C
8C
WDCLK
GATE
RS0
TB8
IE1
D3
9B
8B
WDS2
RB8
C/T
OV
IT1
D2
9A
8A
WDS1
IE0
M1
D1
F1
99
89
TI
WDS0
LSB
IT0
M0
D0
98
RI
88
P
Reset
value
Hex
00H
00H
xxh
00H
00H
07h
00H
00H
00H
00H
00H
[3]
xxh
00H
00H