Use Of The Serial Ports - Rabbit OP7100 User Manual

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 User's 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
the symbolic constants shown in Table 3-2.
Address
00 CNTLA0
01 CNTLA1
02 CNTLB0
03 CNTLB1
04 STAT0
05 STAT1
06 TDR0
07 TDR1
08 RDR0
09 RDR1
42 Hardware
inport
Table 3-2. Z180 Serial Port Registers
Name
Control Register A, Serial Channel 0
Control Register A, Serial Channel 1
Control Register B, Serial Channel 0
Control Register B, Serial Channel 1
Status Register, Serial Channel 0
Status Register, Serial Channel 1
Transmit Data Register, Serial Channel 0
Transmit Data Register, Serial Channel 1
Receive Data Register, Serial Channel 0
Receive Data Register, Serial Channel 1
and library functions using
outport
Description
OP7100