Teridian 71M6403, Manual

Page: 17 / 75

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