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148
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
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