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166 Rabbit 3000 Microprocessor
12.2 Serial Port Registers
Each serial port has 6 registers shown in the tables below. The status, control and extended
registers may have somewhat different formats for different serial ports.
Table 12-2. Serial Port A Registers
Register Name Mnemonic I/O Address R/W Reset
Serial Port A Data Register SADR 0xC0 R/W xxxxxxxx
Serial Port A Address Register SAAR 0xC1 W xxxxxxxx
Serial Port A Long Stop Register SALR 0xC2 W xxxxxxxx
Serial Port A Status Register SASR 0xC3 R 0xx00000
Serial Port A Control Register SACR 0xC4 W xx000000
Serial Port A Extended Register SAER 0xC5 W 00000000
Table 12-3. Serial Port B Registers
Register Name Mnemonic I/O Address R/W Reset
Serial Port B Data Register SBDR 0xD0 R/W xxxxxxxx
Serial Port B Address Register SBAR 0xD1 W xxxxxxxx
Serial Port B Long Stop Register SBLR 0xD2 W xxxxxxxx
Serial Port B Status Register SBSR 0xD3 R 0xx00000
Serial Port B Control Register SBCR 0xD4 W xx000000
Serial Port B Extended Register SBER 0xD5 W 00000000
Table 12-4. Serial Port C Registers
Register Name Mnemonic I/O Address R/W Reset
Serial Port C Data Register SCDR 0xE0 R/W xxxxxxxx
Serial Port C Address Register SCAR 0xE1 W xxxxxxxx
Serial Port C Long Stop Register SCLR 0xE2 W xxxxxxxx
Serial Port C Status Register SCSR 0xE3 R 0xx00000
Serial Port C Control Register SCCR 0xE4 W xx000000
Serial Port C Extended Register SCER 0xE5 W 00000000