User`s guide

LCD Display
M1 System Management Board User’s Guide 15
Push Buttons
Five push buttons are provided at SW1, SW2, SW3, SW4 and SW5, see Figure 2-5. These push buttons are located
near the LCD display and are used to navigate the LCD screen for different tests/demo scripts. These signals are driven
to the A3P250 device.
Figure 2-5. Push Buttons
LCD Display
An 8-bit, 16 x 2 character LCD display (part# LCMS01602DSFC) is provided on the board at LCD1. The A3P250-
FG144 device controls the 8-bit signals, control signals, and backlight of the display. The contrast of the LCD display
can be changed using the potentiometer at R19.
Memory
An external synchronous SRAM (part# 816018) is provided with 1 M x 32 bits memory, located at U8 and U9 on the
board.
Flash memory (part# M29W160ET) is provided with 1 M x 32 bits of memory, located at U25 and U26 on the board.
All signals interface with the M1AFS1500-FG484 device at U23.
PCI
Two PCI ports, P2-PCI_1 and P3-PCI_2, are provided. These two ports interface with the M1AFS1500-FG484
device. The PCI bus supports the 3.3 V 32-bit operations at a system frequency of 33 MHz and 66 MHz and is
compliant with the local bus PCI 2.3 specifications.
Legacy Connector
A 40-pin 0.100 in x 0.100 in connector (J12) is provided for debug purposes. All Actel demonstration and evaluation
boards are populated with this connector so they can interface with other Actel boards.
All I/Os on the legacy connector are shared with the PCI signals.
Note: Do not exercise the PCI connector and the Santa Cruz connector header simultaneously.
UP
Right
Down
Left
SW2
SW1
SW3
SW4
SW5
Select