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參數資料
| 型號： | PCA9501D,118 |
| 廠商： | NXP Semiconductors |
| 文件頁數： | 27/28頁 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 20SOIC |
| 產品培訓模塊： | I²C Bus Fundamentals |
| 特色產品： | NXP - I2C Interface |
| 標準包裝： | 1 |
| 接口： | I²C，SM 總線 |
| 輸入/輸出數： | 8 |
| 中斷輸出： | 是 |
| 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-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 20-SO |
| 包裝： | 標準包裝 |
| 包括： | EEPROM |
| 其它名稱： | 568-5923-6 |
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PCA9501_4
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04 — 10 February 2009
8 of 28
NXP Semiconductors
PCA9501
8-bit I2C-bus and SMBus I/O port with interrupt, 2-kbit EEPROM
7.4 Memory operations
7.4.1 Write operations
Write operations require an additional address eld to indicate the memory address
location to be written. The address eld is eight bits long providing access to any one of
the 256 words of memory. There are two types of write operations, ‘byte write’ and ‘page
write’.
Write operation is possible when the Write Control pin (WC) is put at a LOW logic level (0).
When this control signal is set at 1, write operation is not possible and data in the memory
is protected.
‘Byte write’ and ‘page write’ explained below assume that WC is set to 0.
7.4.1.1
Byte write
To perform a byte write, the START condition is followed by the memory slave address and
the R/W bit set to 0. The PCA9501 will respond with an acknowledge and then consider
the next eight bits sent as the word address and the eight bits after the word address as
the data. The PCA9501 will issue an acknowledge after the receipt of both the word
address and the data. To terminate the data transfer the master issues the STOP
condition, initiating the internal write cycle to the non-volatile memory. Only write and read
operations to the quasi-bidirectional I/Os are allowed during the internal write cycle.
Fig 10. Application of multiple PCA9501s with interrupt
Fig 11. Interrupt generated by a change of input to IO5
002aad293
VDD
MICROCONTROLLER
INT
PCA9501
INT
PCA9501
INT
device 1
device 2
PCA9501
INT
device 16
1
A
S
slave address (I/O expander)
START condition
R/W
acknowledge
from slave
002aad294
1
data from port
1
12345678
SCL
9
SDA
data into IO5
INT
A5 A4 A3 A2 A1 A0
0
IO5
P
STOP
condition
tv(INT)
trst(INT)
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相關代理商/技術參數 |
參數描述 |
|---|---|
| PCA9501PW | 功能描述:I2C 接口集成電路 I/O EXPANDER W/2K EE RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
| PCA9501PW,112 | 功能描述:I2C 接口集成電路 I/O EXPANDER W/2K EE RoHS:否 制造商:NXP Semiconductors 電源電壓-最大:5.5 V 電源電壓-最小:2.3 V 最大工作頻率:400 KHz 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-16 |
| PCA9501PW,118 | 功能描述:接口-I/O擴展器 8BIT I2C RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數量: 最大工作頻率:100 kHz 工作電源電壓:1.65 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 安裝風格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9501PW112 | 制造商:NXP Semiconductors 功能描述:IC I/O EXPANDER 8BIT 400KHZ TSSOP-20 |
| PCA9501PW118 | 制造商:Rochester Electronics LLC 功能描述: 制造商:NXP 功能描述: 制造商:NXP Semiconductors 功能描述: |
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