Table A-3. Jackrabbit Pinout Configurations (continued)

Pin

Rabbit 2000

Alternate Use

Jackrabbit Use

Factory Default

 

 

 

PD0

 

 

 

 

 

 

 

PD1

 

 

Connected to control

 

 

DA0

 

 

 

 

 

 

 

PD2

 

 

Connected to control

 

 

DA0

 

Bitwise or parallel

 

 

 

 

PD3

 

 

programmable I/O,

 

 

PD4

can be driven or open-

ATXB output

Connected to control

drain output

DA1

 

 

 

 

PD5

 

ARXB input

Connected to RS-485 IC

 

data enable input

 

 

 

 

 

 

 

PD6

 

ATXA output

 

 

 

 

 

PD7

 

ARXA input

 

 

 

 

 

PE0

 

I0 output or INT0A input

HV0 output control

 

 

 

 

PE1

 

I1 output or INT1A input

HV1 output control

 

 

 

 

PE2

 

I2 output

HV2 output control

 

 

 

 

PE3

 

I3 output

HV3 output control

 

 

 

 

PE4

Bitwise or parallel

I4 output or external

 

INT0B input

 

 

programmable I/O

 

 

PE5

I5 output or external

 

 

 

 

INT1B input

 

 

 

 

 

 

 

 

PE6

 

I6 output

Connected to A/D

 

comparator output

 

 

 

 

 

 

 

PE7

 

I7 output or slave port

Connected to A/D

 

chip select /SCS

comparator output

 

 

 

 

 

 

PCLK

Peripheral clock

Output

 

 

 

 

 

IOBEN

I/O buffer enable

Output

 

 

 

 

 

WDO

Watchdog output

Single low pulse output

 

 

 

 

 

STAT

Status

Output

Connected to

programming port

 

 

 

 

 

 

 

As shown in Table A-3,pins PE4 and PE5 can instead be used as external INT0B and INT1B interrupts. Pins PD6 and PD7 can instead be used to access Serial Port A on the Rabbit 2000 microprocessor. Pins PB0 and PB1 can instead be used to access the clock on Serial Port B and Serial Port A of the Rabbit 2000 microprocessor.

The four output-only pins are located on PB6–PB7, PCLK, and IOBEN. PB7 can also be used with the slave port of the Rabbit 2000 microprocessor. The primary function of PCLK is as a peripheral clock or a peripheral clock ÷ 2, but PCLK can instead be used as a digital output. Similarly, IOBENB is an I/O buffer enable, but can instead be used as a digital output. STAT and WDO also have limited uses as digital outputs.

User’s Manual

67

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Digi BL1800 user manual PD0 PD1