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PDF SA8807AFA Data sheet ( Hoja de datos )
| Número de pieza | SA8807AFA | |
| Descripción | 96 SEGMENT LIQUID CRYSTAL DISPLAY DRIVER SERIAL (SPI) INTERFACE | |
| Fabricantes | Sames | |
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sames
SA8807A
96 SEGMENT LIQUID CRYSTAL DISPLAY DRIVER
SERIAL (SPI) INTERFACE
FEATURES
• Drives up to 96 segments
• External contrast control
• Serial (SPI) interface with Read/Write • Low power CMOS
capability
• Operates over a wide temperature
range
DESCRIPTION
The SAMES SA8807A Liquid Crystal
Display (LCD) Driver is capable of driving
up to 96 LCD segments and is designed for
displays having 3 or 4 track multiplexed
backplanes.
The SA8807A includes an on-chip
oscillator. The data exchange is carried
out via the Serial Peripheral Interface (SPI).
This LCD driver is ideal for any micro-
controller based system requiring a liquid
crystal display of up to 12 digits.
The SA8807A integrated circuit is available
in both 40 pin dual-in-line plastic (DIP-40),
as well as 44 pin plastic leaded chip carrier
(PLCC-44) package types.
PIN CONNECTIONS
V DD
VS[20]
VS[21]
VS[22]
VS[23]
SCK
MOSI
MISO
CE
RES
END
CLK
GND
M3
VI
NC
VR[0]
VR[1]
VR[2]
VR[3]
DR-00580
Package: DIP-40
VS[19]
VS[18]
VS[17]
VS[16]
VS[15]
VS[14]
VS[13]
VS[12]
VS[11]
VS[10]
VS[9]
VS[8]
VS[7]
VS[6]
VS[5]
VS[4]
VS[3]
VS[2]
VS[1]
VS[0]
4076
PDS039-SA8807-001 REV. C
1/14
11-09-95
1 page  
PIN DESCRIPTION
Pin Pin Designation Description
PLCC-44 DIP-40
26 13
GND
Ground
13 1
18 6
V
DD
SCK
Positive Supply Voltage
(SPI) Serial clock input
19 7
MOSI
(SPI) Master Out: Slave In
20 8
MISO
(SPI) Master In: Slave Out
21 9
CE Chip Enable input
22 10
RES
Reset input
23 11
END
Divider Enable
25 12
CLK Oscillator or clock input
27 14
M3 3 / 4 Backplane enable input
28 15
V1 LCD Voltage input (Contrast)
35 21
VS[0]
LCD segment driver outputs
36 22
VS[1]
37 23
VS[2]
38 24
VS[3]
39 25
VS[4]
40 26
VS[5]
41 27
VS[6]
42 28
VS[7]
43 29
VS[8]
1 30 VS[9]
2 31 VS[10]
3 32 VS[11]
4 33 VS[12]
5 34 VS[13]
6 35 VS[14]
7 36 VS[15]
8 37 VS[16]
9 38 VS[17]
10 39
VS[18]
11 40
VS[19]
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SA8807A
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5 Page 
SA8807A
5. On-Chip LCD Voltage Divider Disable
The integrated divider for the LCD voltages can be disabled by applying a high level
on the EN input (EN = 1).
6. Contrast Setting
The contrast may be adjusted by applying an external LCD voltage on input V1, with
the internal voltage divider activated.
7. Oscillator
The on-chip oscillator circuit requires one external capacitor for operation. The
capacitor value is calculated as follows:
C = 7µF.1Hz/f
f = Required oscillator frequency
The backplane multiplex rate is f/8 for 4-backplane mode and f/6 for 3-backplane
mode.
TYPICAL APPLICATION
The Application Circuit (Figure 1) shows the connections for a typical application when
using a 12 digit (7 segment) display, plus decimal points.
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11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet SA8807AFA.PDF ] | |
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