PDS-500 Vishay, PDS-500 Datasheet - Page 3

• Manufacturer Part Number: PDS-500
• Description: Graphic Plasma, Display Controller
• Manufacturer: Vishay

PARALLEL INTERFACE
J2, PARALLEL DATA CONNECTOR. Mates with 3M #3399-0000 or AMP 746285-6 26 pin, IDC connector. Note: PAR
should be jumper selected on jumper block W1 for proper parallel interface operation.
See timing diagram below.
NOTE - Input load is one 74HCT type input with 4.7k to Vcc.
Once data write is complete, BUSY signal is output. BUSY signal = “1” during data disposition and while the communication
buffer is full.
DATA WRITE
When WR changes from “0” to “1” while US = “0” and RD = “1”, data is latched. All data and character codes are shown in the
Command Set section. WRITE signal should be normally high, strobe low then high when writing.
DATA READ
When RD = “0” while US = “0”, WR = “1”, and DP = “H”, data may be read by the host. READ signal should be normally high,
low when reading.
Document Number: 37074
Revision 14-Mar-02
DESCRIPTION OF SIGNALS
PIN NO
1,3,5,7
9,11,13
15
17
21
6,8,12,
14,16,
18,20,22
23
19
25
4
24
2,26
10
INPUT/OUTPUT TIMING DIAGRAM, J2
BU - DP - WR - RD - US
L - X - ↑ ↑ ↑ ↑ ↑ - H - L
X - H - H - L - L
X - X - X - X - H
Logic Level:
Outputs are 74HC type.
DATA PRESENT (DP)
WRITE (WR) (input)
D0 - D7 (Data Bus)
READ (RD) (input)
US (Unit Select)
BRIGHT/DIM
BLANK (BL)
FUNCTION
BUSY (BU)
GROUND
(output)
(output)
RESET
(input)
(input)
(input)
(input)
N/C
(input/output) the display unit through an 8
H = 2.2V min. to 5.0V max.
L = 0.0V min. to 0.8V max.
Reset display to power-up condition
When BUSY is high, no further data
Read data from display
Data is ready to be read when the
influence display while US is low.
high or half brightness when low.
Blank display while BL is low but
Read and Write commands only
Write data on low to high trans.
DATA PRESENT signal is high.
Display at full brightness when
or commands should be given.
Common to both power supply
Data written to and read from
input and host data interface.
when low, operate while high.
or control code.
Write character
X = Don’t Care
bit bi-directional data bus.
maintain cursor and data.
Input/Output
FUNCTION
while low.
inhibited.
Read data while low.
DESCRIPTION
Not connected.
PDS-500/-1
Vishay Dale
www.vishay.com
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