TSC80251G2D
Table 3. C251 Core SFRs
Mnemonic Name
Mnemonic Name
(1)
(1)
ACC
Accumulator
SPH
Stack Pointer High - MSB of SPX
(1)
(1)
B
B Register
DPL
DPH
Data Pointer Low byte - LSB of DPTR
Data Pointer High byte - MSB of DPTR
(1)
(1)
PSW
Program Status Word
Program Status Word 1
Stack Pointer - LSB of SPX
PSW1
DPXL
Data Pointer Extended Low byte of DPX - Region
number
(1)
SP
Note:
1. These SFRs can also be accessed by their corresponding registers in the register file.
Table 4. I/O Port SFRs
Mnemonic Name
Mnemonic Name
P0
P1
Port 0
Port 1
P2
P3
Port 2
Port 3
Table 5. Timers SFRs
Mnemonic Name
Mnemonic Name
TL0
Timer/Counter 0 Low Byte
TMOD
Timer/Counter 0 and 1 Modes
TH0
TL1
Timer/Counter 0 High Byte
Timer/Counter 1 Low Byte
Timer/Counter 1 High Byte
Timer/Counter 2 Low Byte
Timer/Counter 2 High Byte
Timer/Counter 0 and 1 Control
T2CON
Timer/Counter 2 Control
T2MOD
RCAP2L
RCAP2H
WDTRST
Timer/Counter 2 Mode
TH1
TL2
Timer/Counter 2 Reload/Capture Low Byte
Timer/Counter 2 Reload/Capture High Byte
WatchDog Timer Reset
TH2
TCON
Table 6. Serial I/O Port SFRs
Mnemonic Name
Mnemonic Name
SCON
SBUF
Serial Control
SADDR
BRL
Slave Address
Serial Data Buffer
Baud Rate Reload
Baud Rate Control
SADEN
Slave Address Mask
BDRCON
Table 7. SSLC SFRs
Mnemonic Name
Mnemonic Name
SSCON
SSDAT
SSCS
Synchronous Serial control
SSADR
SSBR
Synchronous Serial Address
Synchronous Serial Bit Rate
Synchronous Serial Data
Synchronous Serial Control and Status
Rev. A - May 7, 1999
11
TEMIC [ TEMIC SEMICONDUCTORS ]
