GLK12232-25-SM-R14 Matrix Orbital, GLK12232-25-SM-R14 Datasheet - Page 22

• Manufacturer Part Number: GLK12232-25-SM-R14
• Description: LCD GRAPHIC DISPL 122X32 WHT/BLU
• Manufacturer: Matrix Orbital

Specifications of GLK12232-25-SM-R14

• Display Type: LCD - Monochrome
• Display Mode: Transmissive
• Viewing Area: 60.20mm L x 18.00mm W
• Backlight: LED - White
• Dot Size: 0.40mm W x 0.40mm H
• Dot Pitch: 0.44mm x 0.44mm
• Dot Pixels: 122 x 32
• Interface: I²C, RS232, TTL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 635-1000; GLK12232-25-SM

6.3 I
the first unread key press. A read is initiated by writing to the module with its base address plus 1, then
clocking the module’s return byte after the module releases the SDA line. Much more detail on this basic
I
(every 500 to 1000 mS is typical). All returned key presses indicate the presence or absence of additional
logged key presses by the most significant bit (MSB - bit 7). If the user has pressed two keys since the last
poll of the keypad interface, the first read will return the key code with bit 7 set and the second read will
return the key code with bit 7 clear. The application must take into account this bit to keep up with user key
presses. If there are no keypresses detected, the module will return zero (0x00).
6.4 RS-232 Interface
rate. This behavior can be modified using commands found in the next section.
6.5 Commands
6.5.1 Auto repeat mode on (254 126 [mode])
Matrix Orbital
2
C function can be found in the I
The keypad is read by I
The module contains a ten key press buffer so that it can be polled for key presses at an infrequent rate
By default on any press of a key, the module will immediately send out the key code at the selected baud
[mode] = 0 gives Resend Key Code mode
[mode] = 1 gives Key down / Key up code mode
NOTE The keypad connector must be wired with columns on one side and rows on the
other side of the center of the connector. In situations where the keypad isn’t wired this
way an adapter will need to be made, or the user should rewire the connector to meet this
requirement.
2
C Interface
2
C master read. In short, this means that a read of the module will always return
2
C specification by Phillips. A good reference is also available at;
Rows
Table 2: Keypad Layout
GLK12232-25-SM
1
2
3
4
5
A
K
U
1
F
P
G
Q
V
B
L
2
Columns
W
M
H
C
R
3
N
D
X
S
4
I
O
Y
E
T
5
J
18