| Notes on the Vibren PXA255 IDP. | |
| Chip select usage: | |
| CS0 - flash | |
| CS1 - alt flash (Mdoc or main flash) | |
| CS2 - high speed expansion bus | |
| CS3 - Media Q, low speed exp bus | |
| CS4 - low speed exp bus | |
| CS5 - low speed exp bus | |
| - IDE: offset 0x03000000 (abs: 0x17000000) | |
| - Eth: offset 0x03400000 (abs: 0x17400000) | |
| - core voltage latch: offset 0x03800000 (abs: 0x17800000) | |
| - CPLD: offset 0x03C00000 (abs: 0x17C00000) | |
| PCMCIA Power control | |
| MAX1602EE w/ code pulled high (Cirrus code) | |
| vx = 5v | |
| vy = 3v | |
| Bit pattern | |
| PWR 3,2,1,0 | |
| vcc vpp A1VCC A0VCC A1VPP A0VPP | |
| ===================================================== | |
| 0 0 0 0 0 0 0x0 | |
| 3 (vy) 0 1 0 1 1 0xB | |
| 3 (vy) 3 (vy) 1 0 0 1 0x9 | |
| 3 (vy) 12(12in) 1 0 1 0 0xA | |
| 5 (vx) 0 0 1 1 1 0x7 | |
| 5 (vx) 5 (vx) 0 1 0 1 0x5 | |
| 5 (vx 12(12in) 0 1 1 0 0x6 | |
| Display power sequencing: | |
| - VDD applied | |
| - within 1sec, activate scanning signals | |
| - wait at least 50mS - scanning signals must be active before activating DISP | |
| Signal mapping: | |
| Schematic LV8V31 signal name | |
| ========================================= | |
| LCD_ENAVLCD DISP | |
| LCD_PWR Applies VDD to board | |
| Both of the above signals are controlled by the CPLD |