dev builds
themes manual
device status forums
mailing lists
IRC bugs
dev guide

Search | Go
Wiki > Main > SamsungZ5

Samsung Z5

Port status

As of Git commit 786d06742a, this port has been removed from the main codebase. This page will remain for historical purposes.


7 tactile buttons and a touchpad (directions).

Dedicated hold switch

SoC: Sigmatel STMP360(B)

Screen resolution: 128 x 160 (RGB) [there are 2 LCD variants, see below in the hardware section]

RAM: 16 MB

Radio (where present): Philips TEA5767

Nand: 1 - 2 - 4 GB splitted in various logical partitions (see under)

Hardware variants: from the bootloader I understood that there are at least something like 8 HW revisions. Of course these revisions are not very different one another, but features are missing. For example my 2 Z5 have both a microphone as well as the FM radio, while the Z5 that someone took apart below has neither FM radio nor microphone. Other variants are NAND type and LCD type.

SLC version --> 1 GB

MLC version --> 2/4 GB


2 firmware updates are available here: The update is performed by placing the =Z5Update.dat file in the root of the player or the System/Data folder, depending on the current version you're player is running. This player runs Linux as well as a particular Java virtual machine! Indeed, the firmware UI is made up in Java and all the class are visible (and hacker-able smile ). Lots of interesting scripts and executable are present in the firmware.

Update process

With the help of the Z5 updater (recovery) application we can restore the firmware through the STMP3600 recovery mode. A as sent to the device. This ~1,8MB file is really complex since it includes some code to load a Linux kernel with a rootfs-based recovery. Then a z5-fw.dat is sent to the user memory (through UMS) and the process of decryption + flashing begins!

Z5Update.dat is a mixture of plain and encrypted bytes.

Meaning Offset Length
Header 0 0x38
Data 0x38 Size of the data
MD5 Encrypted data 0x38 + Size of the data 0x10

Header info Offset Length
Signature (SAMSUNG YEPP) 0 0xC
Unknown 0xC 0x4
Version 0x10 0x8
Region Code 0x18 0x4
Unknown (revision ?) 0x1C 0x4
Model 0x20 0x14
Size of the data 0x34 0x4


Name Offset Length Usage
ufd0p0 16 4MB ( 16 blks, 1 blk = 256KB) chip-0, part-0 (blk 16 ~ 31) ?
ufd0p1 32 4MB ( 16 blks, 1 blk = 256KB) chip-0, part-1 (blk 32 ~ 47) ?
ufd0p2 48 16MB ( 64 blks, 1 blk = 256KB) chip-0, part-2 (blk 48 ~ 111) ?
ufd0p3 112 32MB ( 128 blks, 1 blk = 256KB) chip-0, part-3 (blk 112 ~ 239) ?
ufd0p4 240 923MB (3692 blks, 1 blk = 256KB) chip-0, part-4 (blk 240 ~ 3931) User data
**ufdrawa 16 4MB ( 16 blks, 1 blk = 256KB) chip-0, part-0 (blk 16 ~ 31) ?kernel?
**ufdrawb ? ? rootfs
**ufdrawc ? ? Oasis UI app data


To get the player to present itself as a STMP3600/Player Recovery Class device, hold the middle select button while connecting to USB from the off state.

Keep in mind that this device has a sleep mode and the only way to truly turn it off is by pressing in the reset button on the bottom. (applies to OF, not other modes!!!)


EOREX.png Board4Uart.jpeg

Schematics & Stuff

YP-Z5 Schematics, Service Manual & more!

ADCChannel Usage
ADC0 Tactile Buttons
ADC1 Microphone Power?
ADC2 Touchpad AX-
ADC3 Touchpad AY-
ADC4 Touchpad AX+
ADC5 Touchpad AY+

GPIO/other pins Name Default State (OF) Direction Description / use
PSWITCH PSWITCH L I Special pin to get power button and Center button states
B0P29 (SSP_DATA1) SDRAM_PWR N/A O Powers up the SDRAM before its actual usage
B0P10 (GPMI_D10) FM_BUS N/A O Enables FM radio chip (power)
B0P12 (GPMI_D12) USB_Detect N/A I  
B0P13 (GPMI_D13) ; B0P14 (some HW revisions) Hold_SW N/A I Low: unlocked; High: unlocked
B3P12 (PWM2) LCD_TP N/A I Identify LCD Type (2 possibilities)
B3P13 (PWM3) BLU_ON_LCD N/A O Enable/set backlight, see code for description of usage
B1P21 (LCD_BUSY) Touchpad TY- 0 O Enable touchpad
B3P15 (ROTARYA) Touchpad TX- 1 O Enable touchpad
B0P26 (SSP_CMD) Touchpad TY+ 1 O Enable touchpad
B0P25 (SSP_DETECT) Touchpad TX+ 0 O Enable touchpad
B0P30 (SSP_DATA2) FM_INT (interrupt) N/A I Related to radio chip; RDS package arrived or stereo indication
B1P22 (UART2_CTS) MUTE_ON 0 O Disable audio output
B3P16 (ROTARYB) DTV_DETECT N/A I/O USB_ID as pinout; might be related to some OTG feature ?
B0P28 FM_DETECT N/A I High: FM present; Low: FM absent
B0P27 NAND_TYPE N/A I High: CS4; Low: CS2 (CHECK! Inconsistency with loader's output!)
B0P31 TOUCH_TYPE N/A I High: CAP; Low: REG (?!!?)

Touchpad device shall be enabled via the TX/TY +/- pins. See the "Default value" in the table above.

Useful Links


Bootloader + Some system messages log during bootup

Actual implementations

I'm working on this port and things are going fine, what is implemented so far in a "playground" code to be sent to device is:

  • Keypad (7 buttons)
  • Backlight
  • Display (both LCD types are working fine)
  • Hold button
  • ADC readings
  • Touchpad enable

I Attachment Action Size Date Who Comment
Board4Uart.jpgjpg Board4Uart.jpg manage 800.9 K 02 Dec 2012 - 08:51 LorenzoMiori Help for the UART
YPZ5_SM.pdfpdf YPZ5_SM.pdf manage 7989.5 K 02 Dec 2012 - 09:06 LorenzoMiori Service Manual, Schematics and more
r25 - 14 Aug 2021 - 19:36:47 - RobertMenes

Copyright © by the contributing authors.