參數(shù)資料
型號(hào)： PCF8811
廠商： NXP Semiconductors N.V.
英文描述： 80 x 128 pixels matrix LCD driver
中文描述： 80 × 128像素矩陣LCD驅(qū)動(dòng)器
文件頁數(shù)： 23/73頁
文件大?。?/td> 434K
代理商： PCF8811
2004 May 17
23
Philips Semiconductors
Product specification
80
×
128 pixels matrix LCD driver
PCF8811
handbook, full pagewidth
MBC602
S
START
condition
9
8
2
1
clock pulse for
acknowledgement
not acknowledge
acknowledge
DATA OUTPUT
BY TRANSMITTER
DATA OUTPUT
BY RECEIVER
SCL FROM
MASTER
Fig.25 Acknowledge on the I
2
C-bus.
12.2
I
2
C-bus Hs-mode protocol
The PCF8811 is a slave receiver/transmitter. If data is to
bereadfromthedevice,theSDAHpinmustbeconnected,
otherwise SDAH may be unused.
Hs-mode can only commence after the following
conditions:
START condition (S)
8-bit master code (00001XXX)
Not-acknowledge bit (A).
The master code has two functions: it allows arbitration
and synchronization between competing masters at
F/S-mode speeds, resulting in one winner. The master
code also indicates the beginning of an Hs-mode transfer.
These conditions are illustrated in Figs 26 and 27.
As no device is allowed to acknowledge the master code,
the master code is followed by a not-acknowledge (A).
After this A bit, and the SCLH line has been pulled up to
a HIGH level, the active master switches to Hs-mode and
enables at t
H
the current-source pull-up circuit for the
SCLH signal (see Fig.27).
The active master will then send a repeated START
condition (Sr) followed by a 7-bit slave address with a R/W
bit, and receives an acknowledge bit (A) from the selected
slave.
After each acknowledge bit (A) or not-acknowledge bit (A)
theactivemasterdisablesitscurrentsourcepull-upcircuit.
The active master re-enables its current source again
when all devices have been released and the SCLH signal
reaches a HIGH level. The rising of the SCLH signal is
done by a pull-up resistor and therefore is slower, the last
part of the SCLH rise time is speeded up because the
current source is enabled. Data transfer only switches
back to F/S mode after a STOP condition (P).
A write sequence after the Hs-mode is selected is
illustrated in Fig.28. The sequence is initiated with
a START condition (S) from the I
2
C-bus master which is
followed by the slave address. All slaves with the
corresponding address acknowledge in parallel, the
remainder will ignore the I
2
C-bus transfer.
After the acknowledgement cycle of a write (W), one or
more command words will follow which define the status of
the addressed slaves. A command word consists of
a control byte, which defines Co and D/C, plus a data byte
(see Fig.28 and Table 4).
The last control byte is tagged with a cleared MSB, the
continuation bit Co. The control and data bytes are also
acknowledged by all addressed slaves on the bus.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCF8811MU/2DA/1 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80 x 128 pixels matrix LCD driver
PCF8811MU/2DA/1,02 制造商:NXP Semiconductors 功能描述:LCD DRVR 1.8V/2.5V Die Waffle 制造商:NXP Semiconductors 功能描述:PCF8811MU/UNCASED/WAFLM//2DA/1 - Gel-pak, waffle pack, wafer, diced wafer on film 制造商:NXP Semiconductors 功能描述:LCD DRVR 1.8V/2.5V Die Waffle Waffle 制造商:NXP Semiconductors 功能描述:IC LCD CTLR/DVR CMOS LP UNCASED 制造商:NXP Semiconductors 功能描述:80 x 128 Pixels Matrix LCD Driver
PCF8811U/2DA/1 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80 x 128 pixels matrix LCD driver
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