GLK12232-25-SM Matrix Orbital, GLK12232-25-SM Datasheet - Page 23

• Manufacturer Part Number: GLK12232-25-SM
• Description: LCD Graphic Display Modules & Accessories White Background Blue Text
• Manufacturer: Matrix Orbital

Specifications of GLK12232-25-SM

• Pixel Density: 122 x 32
• Module Size (w X H X T): 86 mm x 35 mm x 14.4 mm
• Viewing Area (w X H): 60.2 mm x 18 mm
• Backlighting: White
• Background Color: Blue, White
• Operating Temperature Range: - 20 C to + 70 C
• Attached Touch Screen: No
• Product: Graphic LCD Module
• Style: LCD Graphic Display
• Interface: RS-232, I2C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

In this mode, when a key is held down, the key code is transmitted immediately and no other codes will be
sent until the key is released. On the release of the key, the key release code transmitted will be a value equal
to the key down code plus 20 hex. For example, the key code associated with key ’P’ (0x50) is pressed, the
release code is ’p’ (0x70).
should be careful of timing details. If the poll rate is slower than the simulated auto-repeat it is possible that
polling for a key up code will be delayed long enough for an unwanted key repeat to be generated.
6.5.2 Auto repeat mode off (254 96)
6.5.3 Auto transmit keypresses on (254 65)
command. This is the default mode on power up.
6.5.4 Auto transmit keypresses off (254 79)
keypad command. Issuing this command places the unit in polled mode.
Matrix Orbital
1. Resend Key Code: This mode is similar to the action of a keyboard on a PC. In this mode, when a
2. Key down / Key up codes: This mode may be used when the typematic parameters of the “Resend
Two modes of auto repeat are available and are set via the same command.
In RS-232 polled mode or via the I
This command turns off auto repeat mode.
In this mode, all keypresses are sent immediately to the host system without the use of poll keypad
In this mode, up to 10 keypresses are buffered until the unit is polled by the host system via the poll
key is held down, the key code is transmitted immediately followed by a 1/2 second delay. After this
delay, key codes will be sent via the RS-232 interface at a rate of about 5 codes per second. This mode
has no effect if polling or if using the I
key code” mode are unacceptable or if the unit is being operated in polled mode. The host system
detects the press of a key and simulates an auto repeat inside the host system until the key release is
detected.
2
C interface, the key down / key up codes are used. However, the user
Figure 14: Poll Timing
GLK12232-25-SM
2
C interface.
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