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參數(shù)資料
| 型號： | PCA9500PW,118 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 23/26頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 16TSSOP |
| 標準包裝： | 2,500 |
| 接口： | I²C，SM 總線 |
| 輸入/輸出數(shù)： | 8 |
| 中斷輸出： | 無 |
| 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： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 16-TSSOP |
| 包裝： | 帶卷 (TR) |
| 包括： | EEPROM，POR |
| 其它名稱： | 935271534118 PCA9500PW-T PCA9500PW-T-ND |
PCA9500_4
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04 — 15 April 2009
6 of 26
NXP Semiconductors
PCA9500
8-bit I2C-bus and SMBus I/O port with 2-kbit EEPROM
7.3 I/O operations
(Refer also to Figure 5.)
Each of the PCA9500'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
002aae591
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
1
0
A2 A1 A0
0
DATA 1 VALID
tv(Q)
Fig 8.
I/O Read mode (input)
1
0
A2 A1 A0
1
A
S0
slave address (I/O expander)
START condition
R/W
acknowledge
from slave
002aae592
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
DATA 2
DATA 3
P
STOP
condition
th(D)
tsu(D)
12345678
SCL
9
DATA 1
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