User manual

PCM-3343 User Manual 14
2.7.1 CRT display connector (CN22)
CN22 is a 12-pin, dual-inline header used for conventional CRT displays. A simple
one-to-one adapter can be used to match CN22 to a standard 15-pin D-SUB connec-
tor commonly used for VGA. Users can drive a standard progressive scan analog
monitor with pixel resolution up to 1024 x 768 @85Hz. Pin assignments for CRT dis-
play connector CN22 are detailed in Appendix A.
2.7.2 TTL connector (CN3)
The PCM-3343 uses SMI SM712 2D graphic Chip that supports single channel 24-bit
TTL panel up to 1024X768 panel resolution.
2.7.3 LVDS connector (CN2)
Four PCM-3343 series, the board supports 1 channel 24-bit LVDS LCD panel dis-
plays up to 1024X768 panel resolution.
2.7.4 Panel Inverter Power (CN14)
The LCD inverter is connected to CN14 via a 5-pin connector to provide +5 V/+12 V
power to the LCD display. J1 provides inverter voltage selection function, closing Pin
1, 2 is for 3.3V power input inverter; closing Pin 2, 3 is for 5V power input inverter.
2.8 Keyboard and PS/2 mouse connector (CN4)
The board provides a keyboard connector that supports both a keyboard and a PS/2
style mouse. In most cases, especially in embedded applications, a keyboard is not
used. If the keyboard is not present, the standard PC/AT BIOS will report an error or
fail during power-on self-test (POST) after a reset. The PCM 3343's BIOS standard
setup menu allows you to select "All, But Keyboard" under the "Halt On" selection.
This allows no-keyboard operation in embedded system applications, without
the system halting under POST.
2.9 Power Connectors (CN5)
Supplies main power +5 V to the PCM-3343, and to devices that require +12 V.
2.10 COM port connector (CN7 & CN12 & CN6)
The board provides four RS-232 serial ports, and CN6 can be configured to RS-422/
485
1. CN7 provides two RS-232 serial ports (COM3/4).
2. CN12 provides two RS-232 serial ports (COM1/2).
3. CN6 provides one RS-422/485 serial port adjusted by J2, and you just can
select either COM2 (RS-232) on CN12 or RS-422/485 on CN6.
Note! 1. When RS-422/485 on CN6 is enabled, COM2(RS-232) on CN12
will be disabled.
2. When using PWM Brightness control, COM2 will be configured for
PWM function use. You can select either COM2 or PWM Bright-
ness control function.