The Treo 650 Hardware

From ShadoWiki

Please note: all hardware addresses are physical addresses (not the translated virtual address that the bootloader exposes).

PXA registers can be located within the Intel PXA27x Family Developer's Guide and won't be listed here.

Contents 1 Attached External Hardware 2 Matrix Keyboard 3 Disk-on-chip 4 LCD 5 LEDs 6 GSM Phone Control

Attached External Hardware

0x00000000 (CS0): Disk-on-chip

0x08000000 (CS2): HTC phone-control ASIC

0xA0000000 (RAM): 32MB RAM

FFUART: GSM Radio (possibly the CDMA radio too)

Matrix Keyboard

The Treo's keyboard uses the PXA's matrix keyboard decoder. This is documented in the PXA manual.

Disk-on-chip

The Disk-on-chip (or DOC) is a 32MB flash chip from M-Systems that contains a TFFS filesystem. It can be accessed directly via its window at 0x00000000, but the TFFS SDK is a better way to interact with its contents.

TFFS is closed filesystem and no Linux driver is available. The Palm SPL/TPL does contain TFFS routines, but they may be difficult to call from Linux.

The Linux MTD project has direct hardware support for DiskOnChip flash memory, so it could be possible to use the JFFS2 filesystem instead of TFFS.

LCD

The LCD on the Treo is a Sony (model number ?). The Treo initializes the LCD control registers with the following values:

LEDs

The LEDs are controlled through the HTC ASIC's register at byte 0x66 (0x0800_0066). The register is a bitfield:

0000 0000 0000 abcd

a: LCD backlight control - 1 = off, 0 = on
b: Keyboard backlight control - 1 = off, 0 = on
c: LED color 1 (?)
d: LED color 2 (?)

GSM Phone Control

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