Rabbit OP7100 User Manual Page 42

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OP710042
Hardware
Table 3-2. Z180 Serial Port Registers
Address Name Description
00 CNTLA0 Control Register A, Serial Channel 0
01 CNTLA1 Control Register A, Serial Channel 1
02 CNTLB0 Control Register B, Serial Channel 0
03 CNTLB1 Control Register B, Serial Channel 1
04 STAT0 Status Register, Serial Channel 0
05 STAT1 Status Register, Serial Channel 1
06 TDR0 Transmit Data Register, Serial Channel 0
07 TDR1 Transmit Data Register, Serial Channel 1
08 RDR0 Receive Data Register, Serial Channel 0
09 RDR1 Receive Data Register, Serial Channel 1
Use of the Serial Ports
If you plan to use the serial ports extensively, or if you intend to use syn-
chronous communications, Rabbit Semiconductor recommends that you
obtain copies of the following Zilog technical manuals, available from
Zilog, Inc, in Campbell, California.
Z180 MPU Users Manual
Z180 SIO Microprocessor Family User’s Manual
Each serial port appears to the CPU as a set of registers. Each port can be
accessed directly with the inport and outport library functions using
the symbolic constants shown in Table 3-2.
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