OP7100
Hardware
33
J3
C104
C106
C101
C95
C96
R62
R61
C102
JP1
Y1
C4
C7
U4
R2
C51
J1
LCD
U1
R1
C12
R51R52
U6
U2
RT1
R33
C49
J2
C1
T1
Q3
DANGER! HIGH VOLTAGE
Q2
C8
C10
R56
R4
Trans-
former
RT2
JP7
JP6
C105
U30
JP10
JP9
JP8
C98
C100
C99
C97
C103
LCD
Control
JP1
Y1
C4
C5
C7
U4
R2
C51
C6
J1
LCD
U3
R1
C12
R51R52
U6
C3
U2
C2
U1
RT1
R33
C49
J2
C1
T1
Q3
DANGER! HIGH VOLTAGE
Q2
C10
R56
R4
Trans-
former
LCD
Control
CURRENT
OP7100
PRE-2006
OP7100
Other functions support the LCD module to adjust its contrast and to turn
the white CCFL backlight on and off. A variable resistor between two of
the LCD module’s terminals sets the contrast, which is set either by soft-
ware or manually, depending on the jumper setting on header JP2. Once a
contrast value is set, it will be maintained. A single programmed I/O bit is
used to turn the backlight on or off.
The controller chip used in OP7100’s sold before 2006 supported either
32K or 64K of SRAM. These OP7100s were designed using a dual-
footprint SRAM to accept either one 32K or two 32K SRAM. One 32K
part was standard.
OP7100 units sold after June, 2006, have a new LCD controller chip because
the previously used LCD controller chip is no longer available. The new LCD
controller chip has 32K of internal SRAM. Figure 3-9 shows the area of the
OP7100 that changed to accommodate the new LCD controller chip. The new
LCD controller is not 100% code-compatible with the old chip—the
New
LCD Controller Chip
section on p. 73 explains how to handle programs
developed for an OP7100 for the older LCD controller chip.
Figure 3-9. How to Identify Pre-2006 OP7100 Boards
Summary of Contents for OP7100
Page 1: ...OP7100 Serial Graphic Display User s Manual 019 0065 070831 O ...
Page 10: ...OP7100 x About This Manual ...
Page 16: ...OP7100 16 Overview ...
Page 74: ...OP7100 74 Software ...
Page 82: ...OP7100 82 Graphics Programming ...
Page 88: ...OP7100 88 Installation ...
Page 98: ...OP7100 98 Specifications ...
Page 108: ...OP7100 108 Memory I O Map and Interrupt Vectors ...
Page 112: ...112 Serial Interface Board 2 OP7100 ...
Page 113: ...OP7100 Backup Battery 113 APPENDIX E BACKUP BATTERY ...
Page 116: ...OP7100 116 Backup Battery ...
Page 124: ...OP7100 124 Index ...
Page 126: ...XX0000 Schematics ...