PowerShot A540[edit | edit source]


CHDK is available for the A540 with firmware version 1.00b from the Download page

Canon PowerShot A540.jpg

Reviews and Specifications[edit | edit source]

Technical Data[edit | edit source]

  • Digic II image processor
  • VxWorks operating system
  • Sensor: 6 MP, 1/2.5-inch CCD type
  • Lens: 5.8 (W) - 23.2 (T) mm (35 mm film equivalent: 35 - 140 mm), F/2.6 (W) - F/5.5 (T)
  • Optical viewfinder
  • Display: 2.5 inch TFT, approx. 85,000 pixels
  • Storage: SD & MMC - no SDHC support !
  • Power: 2x AA size batteries
  • Dimensions: 90.4 x 64.0 x 43.2 mm (3.56 x 2.52 x 1.70 in.), Weight: 180 g (6.35 oz.) without batteries

Firmware info[edit | edit source]

  • The trick with the ver.req file works well on the A540.

Pressing SET and DISP button shows the following screen:

Canon PowerShot A540

Firmware Ver GM1.00B
No error
Jan 31 2006 11:02:45

Pressing SET and DISP button again results in:

Canon PowerShot A540
P-ID:311B  PAL

Adj Ver.002.002
  • The vers.req file works, too.
  • Pressing SET and DISP button a third time results in:
Canon PowerShot A540
P-ID:311B  PAL

Adj Ver.002.002
Total Shoot  :xxxx
Open Shutter :0
Close Shutter:0

The number P-ID:331B is a hexadecimal code for the platform version id. Note that the platform ID is almost the same as the S3 IS model: 311B vs 311A. Platform codes for other models can be looked up under P-ID.

For developers[edit | edit source]

LED addresses[edit | edit source]

0xc0220074 Triggers flash!
0xc0220080 AF
0xc0220084 Print button
0xc0220088 Orange, upper left of viewfinder
0xc022008c Green, upper left of viewfinder
0xc0220090 Yellow, lower left of viewfinder
0xc0220094 Power

Firmware dumps[edit | edit source]


Download location for firmware dumps:
P&S firmware dumps mirror

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