- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367820 > PCF8584 (NXP Semiconductors N.V.) IIC-bus controller(IIC總線控制器) PDF資料下載
參數(shù)資料
| 型號： | PCF8584 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | IIC-bus controller(IIC總線控制器) |
| 中文描述： | IIC總線控制器（國際進口總線控制器） |
| 文件頁數(shù)： | 9/40頁 |
| 文件大?。?/td> | 224K |
| 代理商： | PCF8584 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁
1997 Oct 21
9
Philips Semiconductors
Product specification
I
2
C-bus controller
PCF8584
In receiver mode the data from the shift register is copied to the read buffer during the acknowledge phase. Further
reception of data is inhibited (SCL held LOW) until the S0 read buffer is read (see Section 6.8.1.1).
In the transmitter mode data is transmitted to the I
2
C-bus as soon as it is written to the S0 shift register if the serial I/O is
enabled (ESO = 1).
Remarks
:
1.
A minimum of 6 clock cycles must elapse between consecutive parallel-bus accesses to the PCF8584 when the
I
2
C-bus controller operates at 8 or 12 MHz. This may be reduced to 3 clock cycles for lower operating frequencies.
2.
To start a read operation immediately after a write, it is necessary to read the S0 read buffer in order to invoke
reception of the first byte (‘dummy read’ of the address). Immediately after the acknowledgement, this first byte will
be transferred from the shift register to the read buffer. The
next
read will then transfer the correct value of the first
byte to the microcontroller bus (see Fig.7).
6.8
Control/status register S1
Register S1 controls I
2
C-bus operation and provides I
2
C-bus status information. Register S1 is accessed by a HIGH
signal on register select input A0. For more efficient communication between microcontroller/processor and the I
2
C-bus,
register S1 has separate read and write functions for all bit positions (see Fig.3). The write-only section provides register
access control and control over I
2
C-bus signals, while the read-only section provides I
2
C-bus status information.
Table 4
Control/status register S1
Notes
1.
2.
3.
For further information see Section 6.8.1.
For further information see Section 6.8.2.
Logic 1 if not-initialized.
CONTROL/STATUS
Control
(1)
Status
(2)
BITS
MODE
PIN
PIN
ESO
0
(3)
ES1
STS
ES2
BER
ENI
STA
AAS
STO
LAB
ACK
BB
write only
read only
AD0/LRB
Fig.4 Data shift register/bus buffer S0.
andbook, full pagewidth
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Read Buffer
Data Shift Register S0 and Read Buffer
Shift register
Read
only
Write
only
to/from
I
2
C-Bus SDA line
to/from microcontroller parallel bus
MBE705
相關PDF資料 |
PDF描述 |
|---|---|
| PCF8593 | Low power clock/calendar(低功耗時鐘/日歷) |
| PCF8801 | CRYSTAL RESONATOR, 6MHZ |
| PCF8801U | LCD driver for 140 x 2 segments |
| PCF8811 | 80 x 128 pixels matrix LCD driver |
| PCF8812 | CRYSTAL, 8.0 MHZ |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PCF8584P | 制造商:NXP Semiconductors 功能描述:I2C Bus Controller 20-Pin PDIP Bulk |
| PCF8584P,112 | 功能描述:I2C 接口集成電路 PARALLEL TO I2C CONVERTER 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 |
| PCF8584P112 | 制造商:NXP Semiconductors 功能描述:PARALLEL TO I2C BUS INTERFACE 8584 制造商:NXP Semiconductors 功能描述:IC I2C CONTROLLER DIP-20 |
| PCF8584PN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I/O Port |
| PCF8584T | 制造商:NXP Semiconductors 功能描述: 制造商:Texas Instruments 功能描述: 制造商:NXP Semiconductors 功能描述:I2C Bus Controller 20-Pin SO 制造商:PHILIPS-SEMI 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復。