參數(shù)資料
型號： 935271753118
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8 I/O, PIA-GENERAL PURPOSE, PDSO20
封裝： 4.40 MM, PLASTIC, MO-152, SOT-266-1, SSOP-20
文件頁數(shù)： 33/33頁
文件大?。?/td> 316K
代理商： 935271753118
2002 Nov 22
9
Philips Semiconductors
Product specication
Remote 8-bit I/O expander for I2C-bus
PCF8574
7
FUNCTIONAL DESCRIPTION
Fig.9 Simplified schematic diagram of each I/O.
handbook, full pagewidth
MBD977
DQ
CI
S
FF
DQ
CI
S
FF
100
A
to interrupt
logic
VSS
P0 to P7
VDD
write pulse
data from
shift register
power-on
reset
read pulse
data to
shift register
7.1
Addressing
For addressing see Figs 10, 11 and 12.
Fig.10 PCF8574 and PCF8574A slave addresses.
handbook, full pagewidth
MBD973
S
0
1
0
A2
A1
A0
0
A
1
0
slave address
A
S
0
1
A2
A1
A0
a. PCF8574.
b. PCF8574A.
Each of the PCF8574’s eight I/Os can be independently used as an input or output. Input data is transferred from the
port to the microcontroller by the READ mode (see Fig.12). Output data is transmitted to the port by the WRITE mode
(see Fig.11).
相關(guān)PDF資料
PDF描述
935275581112 8 I/O, PIA-GENERAL PURPOSE, PDSO16
0672.300 Circular Connector; Body Material:Aluminum; Series:PT06; No. of Contacts:55; Connector Shell Size:22; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Circular Contact Gender:Socket; Insert Arrangement:22-55
935084920112 TELEPHONE SPEECH CKT, PDSO20
935084920118 TELEPHONE SPEECH CKT, PDSO20
935084930112 TELEPHONE SPEECH CKT, PDIP20
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