參數(shù)資料
型號： PCA9673DK
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： Remote 16-bit I/O expander for Fm+ I2C-bus with interrupt and reset
中文描述： 18 I/O, PIA-GENERAL PURPOSE, PDSO24
封裝： 3.90 MM, 0.635 MM PITCH, PLASTIC, MO-137, SOT556-1, SSOP-24
文件頁數(shù)： 10/33頁
文件大?。?/td> 185K
代理商： PCA9673DK
PCA9673_1
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 01 — 1 February 2007
10 of 33
NXP Semiconductors
PCA9673
Remote 16-bit I/O expander for Fm+ I
2
C-bus with interrupt and reset
8.
I/O programming
8.1 Quasi-bidirectional I/O architecture
The PCA9673’s 16 ports (see
Figure 2
) are entirely independent and can be used either
as input or output ports. Input data is transferred from the ports to the microcontroller in
the Read mode (see
Figure 17
). Output data is transmitted to the ports in the Write mode
(see
Figure 16
).
Every data transmission from the PCA9673 must consist of an even number of bytes, the
first byte will be referred to as P07 to P00, and the second byte as P17 to P10. The third
will be referred to as P07 to P00, and so on.
This quasi-bidirectional I/O can be used as an input or output without the use of a control
signal for data directions. At power-on the I/Os are HIGH. In this mode only a current
source (I
OH
) to V
DD
is active. An additional strong pull-up to V
DD
(I
trt(pu)
) allows fast rising
edges into heavily loaded outputs. These devices turn on when an output is written HIGH,
and are switched off by the negative edge of SCL. The I/Os should be HIGH before being
used as inputs. After power-on, as all the I/Os are set HIGH, all of them can be used as
inputs. Any change in setting of the I/Os as either inputs or outputs can be done with the
write mode.
Remark:
If a HIGH is applied to an I/O which has been written earlier to LOW, a large
current (I
OL
) will flow to V
SS
.
8.2 Writing to the port (Output mode)
To write, the master (microcontroller) first addresses the slave device. By setting the last
bit of the byte containing the slave address to logic 0 the Write mode is entered. The
PCA9673 acknowledges and the master sends the first data byte for P07 to P00. After the
If more than 2 bytes are read, the slave device loops back to the first byte (manufacturer byte)
and keeps sending data until the master generates a ‘no acknowledge’.
Fig 14. Device ID field reading
002aac334
1
1
1
1
0
0
0
A
S
1
device ID address
START condition
R/W
acknowledge from one
or several slave(s)
A5 A4 A3 A2 A1 A0 X
A6
A
1
1
1
1
0
0
1
1
device ID address
A
I
2
C-bus slave address of
the device to be identified
don't care
acknowledge from
slave to be identified
acknowledge from
slave to be identified
R/W
M6 M5 M4
M7
M2 M1 M0
M3
A
acknowledge
from master
C5 C4 C3
C6
C1 C0 F5
C2
A
acknowledge
from master
manufacturer name
= 00000000
P3 P2 P1
F4
P0 R2 R1 R0
revision = 000
feature identification
= 000100
A
P
STOP
condition
no acknowledge
from master
category identification
= 0000001
相關(guān)PDF資料
PDF描述
PCA9674AN Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt
PCA9674ATS Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt
PCA9674N Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt
PCA9674TS Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt
PCA9674 Remote 8-bit I/O expander for Fm+ I2C-bus with interrupt
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCA9673DK,118 功能描述:接口-I/O擴(kuò)展器 16BIT I2C FM+ QBGPIO 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
PCA9673DK-T 功能描述:接口-I/O擴(kuò)展器 16BIT I2C FM+ QBGPIO INT-RS PU 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
PCA9673D-T 功能描述:接口-I/O擴(kuò)展器 16BIT I2C FM+ QBGPIO INT-RS PU 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
PCA9673PW 功能描述:接口-I/O擴(kuò)展器 16BIT I2C FM+ QBGPIO INT-RS PU 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
PCA9673PW,112 功能描述:接口-I/O擴(kuò)展器 16BIT I2C FM+ QBGPIO 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
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*