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8XC251SA, SB, SP, SQ USER’S MANUAL
C-4
Table C-4. Serial I/O SFRs
Mnemonic Name Address
SCON Serial Control S:98H
SBUF Serial Data Buffer S:99H
SADEN Slave Address Mask S:B9H
SADDR Slave Address S:A9H
Table C-5. Timer/Counter and Watchdog Timer SFRs
Mnemonic Name Address
TL0 Timer/Counter 0 Low Byte S:8AH
TH0 Timer/Counter 0 High Byte S:8CH
TL1 Timer/Counter 1 Low Byte S:8BH
TH1 Timer/Counter 1 High Byte S:8DH
TL2 Timer/Counter 2 Low Byte S:CCH
TH2 Timer/Counter 2 High Byte S:CDH
TCON Timer/Counter 0 and 1 Control S:88H
TMOD Timer/Counter 0 and 1 Mode Control S:89H
T2CON Timer/Counter 2 Control S:C8H
T2MOD Timer/Counter 2 Mode Control S:C9H
RCAP2L Timer 2 Reload/Capture Low Byte S:CAH
RCAP2H Timer 2 Reload/Capture High Byte S:CBH
WDTRST WatchDog Timer Reset S:A6H