Digi BL1800 user manual Use of Rabbit 2000 Parallel Ports, Jackrabbit

A.4 Use of Rabbit 2000 Parallel Ports

Figure A-6shows 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.

PA0–PA7	PB0–	PB6	PD0, PD3,
	PB5	PB7	PD6, PD7

2x RS-232,

1x RS-485, CMOS synch- ronous serial

PCLK

IOBENB

Port A

Serial

Ports

Misc. Outputs

Programming

Port

Port B Port D

JACKRABBIT		Port E	PE4–PE5
RAM	Flash		DA0
Real-Time Clock		D/A Converters
Watchdog			DA1
6 Timers
Slave Port		A/D Converter	AD0
Clock Doubler
Backup Battery

High-Power Outputs

HV0–HV3

Figure A-6. Jackrabbit Subsystems

User’s Manual 65