參數(shù)資料
型號(hào): PAK-III
廠商: Electronic Theatre Controls, Inc.
英文描述: Using the PAK-III I/O Coprocessor
中文描述: 利用巴基斯坦三的I / O協(xié)處理器
文件頁(yè)數(shù): 10/14頁(yè)
文件大?。?/td> 129K
代理商: PAK-III
WRITE
This command writes a byte to the PAK-III's EEPROM. Data stored here will
remain indefinitely, even surviving power loss. Send an address byte (from 0 to
63) and the data byte. The PAK-III will return a 0. Please note that accessing
EEPROM is relatively slow, so be sure to wait for the PAK-III's
acknowledgement before sending more commands. Also keep in mind that there
is a maximum number of write cycles the EEPROM can handle. Once you write
to a cell a certain number of times (between 1 million and 10 million writes) it
will fail. This is typical of all EEPROM.
Typical Circuits and Software
Connecting the Pak-III 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
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BUSY/MODE
ENABLE/BUSY
RES2
RES1
Vdd
B7
B6
B5
B4
B3
B2
B1
B0
Vss
RESET
CLK
SOUT
SIN
Resonator
Both Resistors:
10 to 22K
Busy output (optional)
Data
Clock
Connections to Host
PAK
Example 1. Connections to Stamp or similar host
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