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PDF PT6552 Data sheet ( Hoja de datos )
| Número de pieza | PT6552 | |
| Descripción | 1/2 Duty LCD Driver | |
| Fabricantes | PTC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PT6552 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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DESCRIPTION
The PT6552 is ½ duty dynamic LCD display driver. In
addition to being able to directly Drive LCD panels with
up to 90 segments, it can also control up to 4 general
purpose output ports. This product also includes a key
scan circuit that allows it to accept input from keypads
with up to 30 keys. This allows the end product front
panel wiring to be simplified.
APPLICATIONS
• Cellular phone
• Data bank, organizer
• Electronic dictionary/translator
• P.D.A.
• P.O.S.
• Information appliance
• Caller ID
• Pager
• Electronic equipment with LCD display
BLOCK DIAGRAM
PT6552
½ Duty LCD Driver with On-Chip Key
Input Function
FEATURES
• Up to 4 general purpose output ports
• Up to 90 segments outputs
• Up to 30 key inputs (Key scan is only performed
when a key is pressed)
• ½ duty - ½ bias (up to 90 segments)
• Serial data control sleep mode and the all
segments off function
• Serial data controlled segment output
port/general-purpose output port usage
• Serial data I/O supports CCB format
communication with the system controller
• High generality since display data is displayed
directly without decoder intervention
• Reset pin that can establish the initial state
• Available in 64 pin QFP and 64 pin LQFP package
Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan
1 page  
FUNCTION DESCRIPTION
SERIAL DATA INPUT
WHEN STOPPED WITH CLK AT THE LOW LEVEL
PT6552
WHEN STOPPED WITH CLK AT THE HIGH LEVEL
CCB address: 42H
D1 to D90: Display data
S0, S1: Sleep control data
K0, K1: Key scan output/segment output selection data
P0, P1: Segment output port/general-purpose output port selection data
SC: Segment on/off control data
V1.3
5
July 2010
5 Page 
PT6552
MULTIPLE KEY PRESSES
Without the insertion of additional diodes, the PT6552 supports key scan for double key presses in general, triple key
presses of keys on the lines for input pins KI1 to KI5, and multiple key pressed of keys on the lines for the output pins KS1
to KS6. However, if multiple key presses in excess of these limits occur, the PT6552 may recognize keys that were not
pressed as having been pressed. Therefore, series diodes must be connected to each key.
½ DUTY – ½ BIAS LCD DRIVE SCHEME
V1.3
11 July 2010
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet PT6552.PDF ] | |
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