SanDisk Sansa Clip

Current Status
How to Identify a Clipv2
Sansa v2 firmware file
Forum Thread
Hardware
USB configuration
- Clip v1 in Auto mode
- Clip v2

Current Status

Rockbox runs on all versions of the Clip and is generally stable enough to use.

For details see SansaAMS

How to Identify a Clipv2

A v2 Clip will have a firmware revision starting with 02, while a v1 Clip has a firmware revision starting with 01.

Sansa v2 firmware file

The SansaAMSFirmware page explains the firmware file details needed for porting of Rockbox to Sansa v2 models.

A growing collection of extracted firmware files can be found at Daniel's Sansa Series v2 Firmwares

Forum Thread

Relevant forum threads:

Hardware

For a disassembly of the Sansa Clip hardware, see http://www.anythingbutipod.com/archives/2007/11/sandisk-sansa-clip-disassembled.php

Components:

3.7V lithium battery, markings: +3.7V ATL- / 363830 / A26737 / 308894. The 363830 marking is consistent with the product codes used by Amperex Technology Limited for a battery with dimensions of 30x38x3.6mm, see for example the product page of the ATL XX3038 series. Extrapolating the capacities from this page suggests a capacity a bit lower than 400 mAh for the 363830 battery used in the Clip.
AMS AS3525 SoC, AS3525 datasheet see: http://daniel.haxx.se/sansa/v2.html
Sandisk flash chip, appears to comply to ONFI pinout.
24.00 MHz crystal
FM chip (markings 0216 B2Y2 0735): Silicon Labs Si4702 (identified here)
display controller: Solomon Systech Ltd. SSD1303
OLED display: Udelco UG-2864 Blue/Yellow
32 kHz crystal, looks very much like an Epson MC-146.

Sansa Clip v2 components (8GB), see also this this forum post:

SoC: 20-82-00196-4 : S835-NH7332 : SA0342-8
FM: 0219 CC6S 832
Memory: S83718794 : SDTNLLCHSM-8192 : DP0025407AR
Board: M300 VER2.6

Sansa Clip+ components (2GB):

24.00 MHz crystal
SoC: 20-82-00196-4 : S927-792047 : SA0342-8
FM: 0219 CJLV 923 = SiLabs Si4702
FM: some Sansa Clip+ players use an RDA5802 from RDA Microelectronics.
Memory: X92930301 : SDTNMMAHSM-002G : CP0211708SS

Photographs of Clip+ board:

Front
Back

Device-dependent hardware mappings (buttons and stuff): SansaAMSHardwareMappings

Clip+ variants

The Clip+ comes is a couple of variants:

There are two slightly different OLED controllers, the new one no longer needs a 2-pixel offset and is different w.r.t. brightness/contrast setting. This is auto-detected in Rockbox.
The FM tuner chip can vary, either SI4702 (old) or RDA5802 (new), this is also the case on fuze v2. The FM tuner chip is auto-detected by Rockbox. The variant is visible in the HwInfo diagnostic screen in the original firmware.
The settings for the SD card controller can vary, this is also the case on fuze v2. In the HwInfo diagnostic screen in the original firmware, this can be seen as either "HERMON" (old) or "COMBO4E" (new).

JTAG

On Sansa E200v2's there is an 8-pin JTAG port (see http://forums.rockbox.org/index.php?topic=14064.msg121222#msg121222) with probably the following pin layout:

1: VDD    +
2: TCK    JTAG Clock
3: TDI    JTAG data in
4: TMS    JTAG test mode select
5: nTRST  JTAG test reset, active low
6: TDO    JTAG test data out
7: nSRST  System reset, active low
8: GND    -

The Clip also has 8 pins below the USB connector (on the other side of the PCB), probably this is JTAG too but has not been verified.

The Clip+ uses the following JTAG layout:

ClipPlus JTAG pinout

 DISPLAY
 CONNECTOR

       8           GND
    7              nSRST
       6           TDO   (high impedance)
    5              TCK   (pulldown)
       4           TMS   (pullup)
    3              TDI   (pullup)
       2           nTRST (pulldown)
    1              VCC
 
 BUTTONS

Battery discharge curve

Clip battery discharge curve made with the battery bench plugin, using SVN r19262. Done with processor idling at 240 MHz, display off, shutdown voltage at 3.3V. After the Clip had shut down in rockbox, it would still boot up in the OF, showing 0% battery left. The voltage vs. time curve is fairly linear down to about 3.65V, at which point the voltage starts dropping very quickly.

USB configuration

Clip v1 in Auto mode

Bus 001 Device 118: ID 0781:7432 SanDisk Corp.
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  idVendor           0x0781 SanDisk Corp.
  idProduct          0x7432
  bcdDevice           d3.38
  iManufacturer           1 SanDisk
  iProduct                2 SanDisk Sansa Clip
  iSerial                 3 5011F4065888B49F0000000000000000
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength           39
    bNumInterfaces          1
    bConfigurationValue     1
    iConfiguration          4 config1: Mass Storage only
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass         0 (Defined at Interface level)
      bInterfaceSubClass      0
      bInterfaceProtocol      0
      iInterface              5 sic ifac 1 (Capture::PIMA)
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               4
Device Qualifier (for other device speed):
  bLength                10
  bDescriptorType         6
  bcdUSB               2.00
  bDeviceClass            0 (Defined at Interface level)
  bDeviceSubClass         0
  bDeviceProtocol         0
  bMaxPacketSize0        64
  bNumConfigurations      1
Device Status:     0x0000
  (Bus Powered)

Clip v2

In Auto and MTP mode, idProduct is 0x7434. In MSC mode, idProduct is 0x7435.

Auto mode looks like v1 dump above. MSC mode defines a standard Mass Storage interface with two bulk endpoints, and MTP defines a vendor-specific protocol.