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參數資料
| 型號： | PAK-IV |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Using the PAK-IV I/O Coprocessor |
| 中文描述： | 利用巴基斯坦第四的I / O協處理器 |
| 文件頁數： | 10/14頁 |
| 文件大小： | 131K |
| 代理商： | PAK-IV |
SHIFTOUT
ShiftOut requires a byte argument followed by a data byte. The top four bits of
this argument specify the mode. The bottom four bits is the number of bits to shift
(1 to 8). The mode may be any of the following:
0 – LSBFIRST (LSB shifted out first)
1 – MSBFIRST (MSB shifted out first
The PAK-IV returns a 0.
TOGGLE
Forces the specified pin to be an output and then reverses its state (that is makes a
1 a 0 and a 0 a 1). Always returns 0.
WRITE
This command writes a byte to the PAK-IV's RAM. Data stored here will remain
indefinitely, even surviving power loss. Send an address byte (from 0 to $5F) and
the data byte. The PAK-IV will return a 0.
Typical Circuits and Software
Connecting the Pak-IV to its external components is simple. Supply 5V to Vdd and
ground the Vss pin. Connect the two outer pins of the ceramic resonator to the RES1 and
RES2 pins (the order does not matter). Ground the center pin of the resonator. Connect
the RESET pin to 5V. For the simplest mode of operation connect the ENABLE/BUSY
pin to 5V and the BUSY/MODE pin to 5V through a pull up resistor (10K-22K). Of
course, you'll also need to make connections to the host microprocessor. You may also
want to make different connections to ENABLE/BUSY and BUSY/MODE if you want to
use different methods of synchronizing.
5V
5V
PAK-IV
3
2
10
9
20
7, 8, 19
1
6
5
4
Vss
RESET
CLK
SOUT
SIN
Resonator
Both Resistors:
10 to 22K
Busy output (optional)
Data
Clock
Connections to Host
BUSY/MODE
ENABLE/BUSY
RES2
RES1
Vdd
Example 1. Connections to Stamp or similar host
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