Digi JACKRABBIT BL1800 - Manual (Page 69)

User’s Manual 65
A.4 Use of Rabbit 2000 Parallel Ports
Figure A-6 shows the use of the Rabbit 2000 parallel ports. The Jackrabbit has 27 general-
purpose digital inputs/outputs available on headers J4 and J5—15 are bidirectional (one of
which is used by the RS-485 chip on BL1800 and BL1810 models), seven are inputs only
(one of which is used by the RS-485 chip on BL1800 and BL1810 models), and five are
outputs only (one of which is used by the RS-485 chip on BL1800 and BL1810 models),
as shown in Figure A-6.
Figure A-6. Jackrabbit Subsystems
J
ACKRABBIT
Port A Port B Port D
Port E
Serial
Ports
Programming
Port
PA0–PA7
PB0–
PB5
PB6
PB7
HV0–HV3
2x RS-232,
1x RS-485,
CMOS synch-
ronous serial
PE4–PE5
PD0, PD3,
PD6, PD7
DA0
DA1
AD0
PCLK
IOBENB
Watchdog
6 Timers
Backup Battery
Clock Doubler
Slave Port
Real-Time Clock
RAM Flash
A/D Converter
High-Power Outputs
D/A Converters
Misc. Outputs