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Diffstat (limited to 'board/pxa255_idp/idp_notes.txt')
| -rw-r--r-- | board/pxa255_idp/idp_notes.txt | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/board/pxa255_idp/idp_notes.txt b/board/pxa255_idp/idp_notes.txt new file mode 100644 index 0000000..4746748 --- /dev/null +++ b/board/pxa255_idp/idp_notes.txt @@ -0,0 +1,46 @@ +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 |