參數(shù)資料
型號: PCA9554TS,118
廠商: NXP Semiconductors
文件頁數(shù): 3/35頁
文件大?。?/td> 0K
描述: IC I/O EXPANDER I2C 8B 20SSOP
標(biāo)準(zhǔn)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: 2.3 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-LSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 20-SSOP
包裝: 剪切帶 (CT)
包括: POR
其它名稱: 568-2026-1
PCA9554_9554A
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 9 — 19 March 2013
11 of 35
NXP Semiconductors
PCA9554; PCA9554A
8-bit I2C-bus and SMBus I/O port with interrupt
Fig 13. Read from register
1
0
A2 A1 A0
0
A
S0
START condition
R/W
acknowledge
from slave
002aac474
A
acknowledge
from slave
SDA
A
P
command byte
acknowledge
from master
data from register
DATA (first byte)
slave address
STOP
condition
S
(repeated)
START condition
(cont.)
1
0
A2 A1 A0
1
A
0
R/W
acknowledge
from slave
slave address
at this moment master-transmitter becomes master-receiver
and slave-receiver becomes slave-transmitter
NA
no acknowledge
from master
data from register
DATA (last byte)
This figure assumes the command byte has previously been programmed with 00h.
Transfer of data can be stopped at any moment by a STOP condition.
Fig 14. Read Input Port register
1
0
A2 A1 A0
1
A
S0
START condition
R/W
acknowledge
from slave
002aac475
A
acknowledge
from master
SCL
SDA
NA
read from
port
data into
port
P
th(D)
9
8
7
6
5
4
3
2
1
data from port
no acknowledge
from master
data from port
DATA 4
slave address
DATA 1
STOP
condition
DATA 2
DATA 3
DATA 4
tsu(D)
INT
tv(INT_N)
trst(INT_N)
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