![background image](http://html2.mh-extra.com/html/rabbit/2000/2000_user-manual_3110256112.webp)
106
Rabbit 2000 Microprocessor
9.5 Parallel Port E
Parallel port E, shown in Figure 9-2, has eight I/O pins that can be individually pro-
grammed as inputs or outputs. Port E has a higher drive than most of the other ports. PE7
is used as the slave port chip select when the slave port is enabled. Each of the port E out-
puts can be configured as an I/O strobe. In addition, four of the port E lines can be used as
interrupt request inputs. The output registers are cascaded and timer-controlled, making it
possible to generate precise timing pulses.
Figure 9-2. Parallel Port E Block Diagram
PE7
PE4
I/O Data
perclk/2
Timer A1
Timer B1
Timer B2
perclk/2
Timer A1
Timer B1
Timer B2
PE3
PE0
I6
/scs
Inputs
I4
I7
I5
I2
I0
I3
I1
INT1
INT0
INT1
INT0
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...