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參數資料
| 型號： | PCA9554N |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-bit I2C and SMBus I/O port with interrupt |
| 中文描述： | 8 I/O, PIA-GENERAL PURPOSE, PDIP16 |
| 封裝： | 0.300 INCH, PLASTIC, MO-001, SOT-38-1, DIP-16 |
| 文件頁數： | 8/20頁 |
| 文件大小： | 183K |
| 代理商： | PCA9554N |
Philips Semiconductors
Product data sheet
PCA9554/PCA9554A
8-bit I
2
C and SMBus I/O port with interrupt
2004 Sep 30
8
0
0
A2
A1 A0
0
1
0
0
A2
A1
A0
0
1
S
0
A
A
A
COMMAND BYTE
acknowledge
from slave
R/W
acknowledge
from slave
A
P
NA
acknowledge
from slave
acknowledge
from master
S
DATA
DATA
R/W
first byte
at this moment master-transmitter
becomes master-receiver and
slave-receiver becomes
slave-transmitter
last byte
su01424
no acknowledge
from master
1
slave address
data from register
data from register
slave address
Figure 9. READ from register
0
1
0
0
A2
A1
A0
READ FROM
PORT
DATA INTO
PORT
SDA
S
1
A
A
DATA 1
DATA 4
slave address
data from port
data from port
start condition
R/W
acknowledge
from slave
acknowledge
from master
stop
condition
t
ps
DATA 4
DATA 2
P
DATA 3
t
ph
su01465
no acknowledge
from master
NA
INT
t
ir
t
iv
1
2
SCL
3
4
5
6
7
8
9
NOTES:
1. This figure assumes the command byte has previously been programmed with 00h.
2. Transfer of data can be stopped at any moment by a stop condition.
Figure 10. READ input port register
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| PCA9554PW,118-CUT TAPE | 制造商:NXP 功能描述:PCA9554 Series 8-bit I2C-bus and SMBus I/O port w/ Interrupt - TSSOP-16 |
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