71M6403
Electronic Trip Unit
SEPTEMBER 2006
Special Function Registers (Generic 80515 SFRs)
Table 6 shows the location of the SFRs and the value they assume at reset or power-up.
Name
P0
SP
DPL
DPH
DPL1
DPH1
WDTREL
PCON
TCON
TMOD
TL0
TL1
TH0
TH1
CKCON
P1
Location
0x80
0x81
0x82
0x83
0x84
0x85
0x86
0x87
0x88
0x89
0x8A
0x8B
0x8C
0x8D
0x8E
0x90
0x92
0x98
0x99
0x9A
0x9B
0x9C
0x9D
0xA0
0xA8
0xA9
0xAA
0xB0
0xB8
0xB9
0xBA
0xBB
0xBF
0xC0
0xD0
0xD8
0xE0
0xF0
Reset value
0xFF
0x07
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x01
0xFF
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0x00
0xD9
0xFF
0x00
0x00
0x03
0x03
0x00
0x00
0x00
0x00
0x00
0x00
Description
Port 0
Stack Pointer
Data Pointer Low 0
Data Pointer High 0
Data Pointer Low 1
Data Pointer High 1
Watchdog Timer Reload register
UART Speed Control
Timer/Counter Control
Timer Mode Control
Timer 0, low byte
Timer 1, high byte
Timer 0, low byte
Timer 1, high byte
Clock Control (Stretch=1)
Port 1
Data Pointer select Register
Serial Port 0, Control Register
Serial Port 0, Data Buffer
Interrupt Enable Register 2
Serial Port 1, Control Register
Serial Port 1, Data Buffer
Serial Port 1, Reload Register, low byte
Port 2
Interrupt Enable Register 0
Interrupt Priority Register 0
Serial Port 0, Reload Register, low byte
Port 3
Interrupt Enable Register 1
Interrupt Priority Register 1
Serial Port 0, Reload Register, high byte
Serial Port 1, Reload Register, high byte
User 2 Port, high address byte for MOVX@Ri
Interrupt Request Control Register
Program Status Word
Baud Rate Control Register (only WDCON.7 bit used)
Accumulator
DPS
S0CON
S0BUF
IEN2
S1CON
S1BUF
S1RELL
P2
IEN0
IP0
S0RELL
P3
IEN1
IP1
S0RELH
S1RELH
USR2
IRCON
PSW
WDCON
A
B
B Register
Table 6: Special Function Registers Reset Values
Page: 17 of 75
© 2006 TERIDIAN Semiconductor Corporation
REV 1.0
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
