![background image](http://html2.mh-extra.com/html/rabbit/2000/2000_user-manual_3110256063.webp)
User’s Manual
57
I/O Strobes
/I0,/I1,
/I2, /I3,
/I4, /I5,
/I6, /I7
Outputs
I/O strobes. Each strobe uses 1/8th of the
I/O space or 8K addresses. Each strobe can
be programmed as: chip select, read, write,
combined read or write. These are
alternate pin assignment for parallel port E,
bits 0–7. Each pin may be individually re-
assigned from parallel port to strobe
functionality.
21–26, 29, 30
External
Interrupt 0
INT0A,
INT0B
Inputs
These pins are sampled and an interrupt
request for external interrupt number 0 is
latched on a specified transition (pos, neg,
either). There is a separate latch for each
pin. May be enabled when this pin is set up
as input for parallel port E. The value of
the pin may also be read via the parallel
port. Uses bits 0, 4 of the parallel port. If
parallel port is set up as output, the parallel
port output may be used to cause the
interrupt.
24, 30
External
Interrupt 1
INT1A,
INT1B
Inputs
These pins are sampled and an interrupt
request for external interrupt number 1 is
latched on a specified transition (pos, neg,
either). There is a separate latch for each
pin. May be enabled when this pin is set up
as input for parallel port E. The value of the
pin may also be read via the parallel port.
Uses bits 1, 5 of the parallel port. If parallel
port is set up as output, the parallel port
output may be used to cause the interrupt.
23, 29
Table 5-1. Rabbit Pin Descriptions (continued)
Pin Group
Pin Name
Direction
Function
Pin Numbers
Содержание 2000
Страница 1: ...Rabbit 2000 Microprocessor User s Manual 019 0069 041018 M...
Страница 12: ...6 Rabbit 2000 Microprocessor...
Страница 46: ...40 Rabbit 2000 Microprocessor...
Страница 54: ...48 Rabbit 2000 Microprocessor...
Страница 76: ...70 Rabbit 2000 Microprocessor...
Страница 96: ...90 Rabbit 2000 Microprocessor...
Страница 142: ...136 Rabbit 2000 Microprocessor...
Страница 154: ...148 Rabbit 2000 Microprocessor...
Страница 170: ...164 Rabbit 2000 Microprocessor...
Страница 174: ...168 Rabbit 2000 Microprocessor...
Страница 180: ...174 Rabbit 2000 Microprocessor...
Страница 202: ...196 Rabbit 2000 Microprocessor...
Страница 206: ...200 Rabbit 2000 Microprocessor...
Страница 226: ......
Страница 230: ...224 Rabbit 2000 Microprocessor...