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PD16681A Arkusz danych(PDF) 8 Page - Renesas Technology Corp

Numer części PD16681A
Szczegółowy opis  LCD CONTROLLER/DRIVER FOR DOT MATRIX DISPLAY OF JIS LEVEL 1 AND JIS LEVEL 2 KANJI SETS
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Producent  RENESAS [Renesas Technology Corp]
Strona internetowa  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

PD16681A Arkusz danych(HTML) 8 Page - Renesas Technology Corp

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Data Sheet S14207EJ3V0DS
6
µµµµPD16681A
3.2 Logic System Pins
Pin Symbol
Pin Name
Pad No.
I/O
Description
WS
Select word length
76
Input
Use this pin to select the word length. An 8-bit parallel interface is used
for high level and a serial interface is used for low level. This setting
cannot be changed after the power has been switched on.
DACHA
Select D/A converter
61
Input
Use this pin to select whether or not to use the D/A converter for
regulating the LCD driver voltage. Select high level to use the D/A
converter or low level to not use it.
STB
Strobe
77
Input
This is used for the device’s select signal and strobe signal for
communication. Communication is initialized at the rising edge or falling
edge of STB.
Command data receive standby status occurs at the falling edge of STB.
Communication is enabled when STB is low.
Also, enabled status or the shift clock is ignored when STB is high.
E/SCK
Enable/shift clock
78
Input
This is an input enable pin for data when the parallel interface is used.
During the read-in operation, data is captured in the interface buffer at
the signal’s rising edge. During a read-out operation, data is read-out
from the interface buffer at the signal’s falling edge.
When using a serial interface, this pin is used for the data shift clock.
During the read-in operation, data is captured in the shift register at the
signal’s rising edge. During a read-out operation, data is read from the
shift register at the signal’s falling edge.
D0/DATA
Data bus/data
68
I/O
This pin is used for data bus bit D0 when using the parallel interface.
When using the serial interface, it is an I/O pin (tri-state) for commands
and display data.
D1-D7
Data bus
69 to 75
I/O
These pins are used for data bus bits D1 to D7 when using the parallel
interface.
It should be fixed high or low when using the serial interface.
TESTOUT
Test output
80
Output This is a test output pin. Leave this pin open when using the device.
/RESET
Reset
79
Input
This pin is used for internal resets at low-level.
AMPCHA
Op amp switch for
LCD driver’s power
supply level
62
Input
This pin is used to control the op amp that works with the LCD driver’s
power supply level. High-power mode is set when at low level and
normal mode is set when at high level.
VEXT
Reference power
supply switch
60
Input
This pin is used to select the reference power supply circuit’s supply
mode. High level sets external mode and low level sets internal mode.
SEGINV
Segment direction
switch
63
Input
This pin is used to control the segment output direction. Low level sets
forward direction and high level sets reverse direction.
COMINV
Common scan
direction switch
64
Input
This pin is used to switch the common scan direction. Low level sets
forward direction and high level sets reverse direction.
OSCIN
Oscillator
65
Input
These pins are connected to a 100-k
Ω resistance. When using an
OSCOUT
66
Output external oscillator, input to OSCIN and leave OSCOUT open.
OSCBRI
External clock for
blink function
67
Input
This is an input pin for the 2-Hz external clock. Internally, it is divided by
half to generate a 1-Hz signal that is used as the synchronization signal
for the blink function.


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