200 Rows Mode; Two Bit Parallel Data; Brightness Control; Self Test - Planar EL640.400-C2 User Manual

200 Rows Mode

Two Bit Parallel Data

Brightness Control

Self Test

10 EL640.400-C2, -C3 and –CD3 Operations Manual (020-0355-00A)
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200 Input data rows may be displayed using 400 rows by automatically
doubling every data row to two consecutive display rows. This function is
selected by removing jumper PS2/2 (F2040). The _BLANK input must also be in
LOW state. For more information of this mode contact Planar.
To reduce the input data frequency in NORMAL mode the Video data can be
input two bits per clock cycle. The two data inputs are organized so that the
data for the odd columns, numbered from left to the right at the viewers side,
is input at the TVID (J1/ pin 7) and the data for the even columns at VID (J1/ pin
15). The two bit parallel mode is selected by removing jumper 3 of the pin
strip PS2.
The brightness of the display can be adjusted (appr. between 10 and 100%) by
Ω
an external 50k logarithmic potentiometer between the LUMPOT1 and
LUMPOT 2 inputs (J3/pins 1 and 2). The control function is done by feeding a
small DC current signal via the external potentiometer from LUMPOT1 (+5V
reference voltage) to LUMPOT2. If the two inputs are left disconnected, the
brightness is at its maximum level.
The operation of the display can be easily checked without any external
signals by the self test function.
Remove Jumper 1 in pinstrip PS2.
Connect power to the display.
All pixels of the display will be lit with the exception of the first half of the
topmost row.