any work around to flash faster than 1mhz?

[simpleprince49]

hello

i have here xcover 4s with mdm lock no download mode so i try to write combination directly by isp

connected the pinouts and the emmc is detected and can be read even in 36mhz @ 1bit
my problem is i connot write it with even at 6mhz the only thing that work is on 1mhz and even it has some errors sometimes..

it consumes about 5 to 6 hours to complete a combination flashing..

i have 20pcs of this phone and the owner can only wait for 3days..i think i can managed it without even sleping but i think its too much

[simpleprince49]

managed to make it faster..just flashed

sboot.bin
param.bin
cm.bin
vbmeta.img
boot.img
recovery.img
dt.img
dtbo.img
and 2% of system.img

now i have download mode with errors so just continued to flashed it by z3x box..

[layder]

1Mhz freq is have at bad wires
post photo of you ISP wires with connected PCB

[simpleprince49]

Originally Posted by layder

1Mhz freq is have at bad wires
post photo of you ISP wires with connected PCB

[layder]

============
Important requirements that must be met for a quality ISP connection:
- GND wire should be much thicker compared to others
- the length of all wires must be same
- the length of all wires should be kept to a minimum. Best length is 5-10 centimeters


CLK clock at ISP mode determines the data trarsfer speed beetwin eMMC and box. If the above requirements are met, the stability of operation is ensured at frequencies up to 24-36MHz. The best performance is from 14-24MHz. There is no need to use lower frequencies.
============


you wires is long
you gnd wire not ok

[simpleprince49]

i make like this..tried on a faster computer with ssd but nothings changed..im still able to read at 36mhz but writing only works @1mhz
thank you for the reply il just make it in another way

[layder]

Originally Posted by simpleprince49

i make like this..tried on a faster computer with ssd but nothings changed..im still able to read at 36mhz but writing only works @1mhz
thank you for the reply il just make it in another way

for some devices you need add PULL-UP resistors for best connection, for CMD/DAT
alsio you need change VIO for best results for device with prolems

I never use 1Mhz
12Mhz and faster always work


- GND wire should be much thicker compared to others

[simpleprince49]

https://ibb.co/nkBg089

my image was not uplaoded from my message above..i was talking about this

i was not having problem with my wires before in other models can write using it @24mhz maybe i will be needing pullup resistors for this model