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參數(shù)資料
| 型號(hào)： | PCA9501PW,118 |
| 廠商： | NXP Semiconductors |
| 文件頁(yè)數(shù)： | 2/28頁(yè) |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER I2C 8B 20TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 接口： | I²C，SM 總線 |
| 輸入/輸出數(shù)： | 8 |
| 中斷輸出： | 是 |
| 頻率 - 時(shí)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-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 20-TSSOP |
| 包裝： | 帶卷 (TR) |
| 包括： | EEPROM |
| 配用： | 568-4002-ND - DEMO BOARD I2C |
| 其它名稱： | 935271535118 PCA9501PW-T PCA9501PW-T-ND |
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PCA9501_4
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 04 — 10 February 2009
10 of 28
NXP Semiconductors
PCA9501
8-bit I2C-bus and SMBus I/O port with interrupt, 2-kbit EEPROM
7.4.2.2
Random read
The PCA9501’s random read mode allows the address to be read from to be specied by
the master. This is done by performing a dummy write to set the address counter to the
location to be read. The master must perform a byte write to the address location to be
read, but instead of transmitting the data after receiving the acknowledge from the
PCA9501, the master re-issues the START condition and memory slave address with the
R/W bit set to one. The PCA9501 will then transmit an acknowledge and use the next
eight clock cycles to transmit the data contained in the addressed location. The master
ceases the transmission by issuing the STOP condition after the eighth bit, omitting the
ninth clock cycle acknowledge.
7.4.2.3
Sequential read
The PCA9501 sequential read is an extension of either the current address read or
random read. If the master does not issue a STOP condition after it has received the
eighth data bit, but instead issues an acknowledge, the PCA9501 will increment the
address counter and use the next eight cycles to transmit the data from that location. The
master can continue this process to read the contents of the entire memory. Upon
reaching address 255 the counter will return to address 0 and continue transmitting data
until a STOP condition is received. The master ceases the transmission by issuing the
STOP condition after the eighth bit, omitting the ninth clock cycle acknowledge.
Fig 14. Current address read
1
A
S
slave address (memory)
START condition
R/W
acknowledge
from slave
002aad298
data from memory
SDA
A5 A4 A3 A2 A1 A0
1
P
STOP condition
Fig 15. Random read
0
A
S
slave address (memory)
START condition
R/W
acknowledge
from slave
002aad299
word address
SDA
A5 A4 A3 A2 A1 A0
1
P
STOP
condition
A
acknowledge
from slave
data from memory
A
acknowledge
from slave
1
S
slave address (memory)
START condition
R/W
A5 A4 A3 A2 A1 A0
1
Fig 16. Sequential read
1
A
S
slave address (memory)
START condition
R/W
acknowledge
from slave
002aad300
data from memory
SDA
A5 A4 A3 A2 A1 A0
1
P
STOP
condition
A
acknowledge
from master
data from memory
DATA n
data from memory
DATA n + 1
A
acknowledge
from master
DATA n + X
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA9501PW-T | 制造商:NXP Semiconductors 功能描述:I2C and SMBus I/O Port 20-Pin TSSOP T/R 制造商:NXP Semiconductors 功能描述:8-BIT I2C-BUS AND SMBUS I/O PORT WITH INTERRUPT, 2-KBIT EEPROM AND 6 ADDRESS PINS |
| PCA9502 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit I/O expander with I2C-bus/SPI interface |
| PCA9502BS | 功能描述:接口-I/O擴(kuò)展器 8-BITI/O EXPDR W/I2C-SPI INTRF RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9502BS,128 | 功能描述:接口-I/O擴(kuò)展器 8-BITI/O EXPDR RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
| PCA9502BS,151 | 功能描述:接口-I/O擴(kuò)展器 I/O EXPANDER I2C RoHS:否 制造商:NXP Semiconductors 邏輯系列: 輸入/輸出端數(shù)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(fēng)格:SMD/SMT 封裝 / 箱體:HVQFN-16 封裝:Reel |
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