參數(shù)資料
型號(hào): PCF85162T/1
廠商: NXP SEMICONDUCTORS
元件分類: 顯示驅(qū)動(dòng)器
英文描述: LIQUID CRYSTAL DISPLAY DRIVER, PDSO48
封裝: 6.10 MM, PLASTIC, MO-153, SOT362-1, TSSOP-48
文件頁(yè)數(shù): 40/43頁(yè)
文件大?。?/td> 321K
代理商: PCF85162T/1
PCF85162_2
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 02 — 7 May 2010
6 of 43
NXP Semiconductors
PCF85162
Universal LCD driver for low multiplex rates
The host microprocessor or microcontroller maintains the 2-line I2C-bus communication
channel with the PCF85162. The internal oscillator is enabled by connecting
pin OSC to pin VSS. The appropriate biasing voltages for the multiplexed LCD waveforms
are generated internally. The only other connections required to complete the system are
to the power supplies (VDD, VSS, and VLCD) and the LCD panel chosen for the application.
7.1 Power-on reset
At power-on the PCF85162 resets to the following starting conditions:
All backplane and segment outputs are set to VLCD
The selected drive mode is: 1:4 multiplex with 13 bias
Blinking is switched off
Input and output bank selectors are reset
The I2C-bus interface is initialized
The data pointer and the subaddress counter are cleared (set to logic 0)
Display is disabled
Remark: Do not transfer data on the I2C-bus for at least 1 ms after a power-on to allow
the reset action to complete.
7.2 LCD bias generator
Fractional LCD biasing voltages are obtained from an internal voltage divider consisting of
three impedances connected in series between VLCD and VSS. The center impedance is
bypassed by switch if the 1
2 bias voltage level for the 1:2 multiplex drive mode
configuration is selected. The LCD voltage can be temperature compensated externally,
using the supply to pin VLCD.
The resistance of the power lines must be kept to a minimum.
Fig 4.
Typical system configuration
HOST
MICRO-
PROCESSOR/
MICRO-
CONTROLLER
tr
2Cb
SDA
SCL
OSC
32 segment drives
4 backplanes
LCD PANEL
(up to 128
elements)
PCF85162
A0
16
15
11
10
14
21
17
18
19
20
A1
A2
SA0
VDD
VSS
VDD
VLCD
013aaa066
R
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