Sony NWZ-S540

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Overview

This is the page for the Sony NWZ-S540 series (NWZ-S543, NWZ-S544, NWZ-S545)

Port status

There is no Rockbox port for this player

I uploaded a copy of the original firmware v1.0.1 here: firmware.sb

The patch tracker contains some incomplete port. The missing part is the raw nand flash. Since there is no sdcard slot and no plan to support to the raw nand flash, we do not plan to finish this port.

Hardware

The Sony NWZ-S540 features 12 hardware buttons: power/option, play/pause, left, right, up, down, home/back, volume up, volume down, hold, speaker/earphones, reset.

Chip labels: 9VAI8 NWI79 G8KB

98or 9B 2113A

STMP3780 A3PTX A00941AU TAIW

9UAI7 D9FRN FORK MT

STFM1000 B2 FNUB DHRNA

Recovery Mode

One can reach the recovery mode by powering off the unit and plug the USB cable while holding the power button. There are two other alternative methods:

• power on the player (without USB cable plugged), hold power and plug the USB cable while holding power for at least one or two seconds
• plug the USB cable, hold power and press the reset button while holding power for at least one or two seconds

PCB Scans

Pins

Here is a list of all the pins used by the OF. Pins are of form BxPyy where x is the bank and yy the number within the bank. Direction only applies to GPIO.

Pin	Dir	Comment
B0P0{0-7}	ssp2_d{0-7}
B0P10	OUT	Backlight gate
B0P12	OUT	microphone gate/power (unsure)
B0P13	OUT	See B0P27, audio related (unsure)
B0P15	OUT	wm port uart (unsure)
B0P20	ssp2_cmd
B0P24	ssp2_sck
B0P27	OUT	See B0P13, audio related (unsure)
B0P28	OUT	audio related (unsure)
B0P{30,31}	i2c_{scl,sda}	tuner i2c
B1P{00-7}	lcd_d{0-7}
B1P18	lcd_reset
B1P19	lcd_rs
B1P20	lcd_wr
B1P28	pwm2	Backlight
B1P29	OUT	See B0P28, audio related (unsure)
B2P01	OUT	audio related (unsure)
B2P03	IN	Used to determine device variant
B2P04	IN	Used to determine device variant

Device variant are as follows (see section below for comment):

B2P04	B2P03	Device
0	0	NWZ-E340
0	1	NWZ-E440 or NWZ-E440K
1	0	NWZ-BB
1	1	NWZ-S540

Models

Apparently the same firmware is used for several players. The model is determined from two pins and/or the MMC. The following players are handled: E340, E360, E440, E440K, S540, BB. This is just a wild guess and it does not mean in any way that one can take the OF from one and put it on the other, there might be other differences.

-- LudovicJacques - 06 Dec 2013