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參數(shù)資料
型號: PCA9501BS,118
廠商: NXP Semiconductors
文件頁數(shù): 25/28頁
文件大?。?/td> 0K
描述: IC I/O EXPANDER I2C 8B 20HVQFN
產(chǎn)品培訓模塊: I²C Bus Fundamentals
特色產(chǎn)品: NXP - I2C Interface
標準包裝: 1
接口: I²C,SM 總線
輸入/輸出數(shù): 8
中斷輸出:
頻率 - 時鐘: 400kHz
電源電壓: 2.5 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-VQFN 裸露焊盤
供應商設備封裝: 20-HVQFN(5x5)
包裝: 標準包裝
包括: EEPROM
產(chǎn)品目錄頁面: 824 (CN2011-ZH PDF)
配用: 568-4002-ND - DEMO BOARD I2C
其它名稱: 568-3352-6
PCA9501_4
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04 — 10 February 2009
6 of 28
NXP Semiconductors
PCA9501
8-bit I2C-bus and SMBus I/O port with interrupt, 2-kbit EEPROM
7.2 Control register
The PCA9501 contains a single 8-bit register called the Control register, which can be
written and read via the I2C-bus. This register is sent after a successful acknowledgment
of the slave address.
It contains the I/O operation information.
7.3 I/O operations
(Refer also to Figure 5.)
Each of the PCA9501's eight I/Os can be independently used as an input or output.
Output data is transmitted to the port by the I/O Write mode (see Figure 7). Input I/O data
is transferred from the port to the microcontroller by the Read mode (see Figure 8).
Fig 7.
I/O Write mode (output)
0
A
S
slave address (I/O expander)
START condition
R/W
acknowledge
from slave
002aad290
DATA 1
data to port
A
acknowledge
from slave
12345678
SCL
9
SDA
DATA 2
A
write to port
data out from port
tv(Q)
acknowledge
from slave
DATA 2 VALID
data to port
A5 A4 A3 A2 A1 A0
0
DATA 1 VALID
tv(Q)
Fig 8.
I/O Read mode (input)
A5 A4 A3 A2 A1 A0
1
A
S0
slave address (I/O expander)
START condition
R/W
acknowledge
from slave
002aad291
data from port
A
acknowledge
from master
SDA
1
no acknowledge
from master
read from
port
data into
port
data from port
DATA 1
DATA 4
INT
DATA 4
DATA 2
DATA 3
P
STOP
condition
tv(INT)
trst(INT)
th(D)
tsu(D)
12345678
SCL
9
DATA 1
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