|| Device || Physical   || Virtual ||
|| latch1 || 0x01000000 || 0xEA000000 ||
|| latch2 || 0x08000000 || 0xEC000000 ||
|| modem  || 0x04000000 || 0xEB000000 ||

The E3 uses 3 HC377 octal d-type flip-flops to create 1 8-bit and 1 16-bit latch.
These are write-only.  

'''latch1 (8 bit)'''

||Bit  	||Function       ||
||0 	||Camera LED     ||
||1 	||Advert LED     ||
||2 	||Email LED      ||
||3 	||Handsfree LED  ||
||4 	||Voicemail LED  ||
||5 	||Voice LED      ||
||6 	||Connected to dockit port. Inverted and at 5v levels||
||7 	||Connected to dockit port. Inverted and at 5v levels||

'''latch2 (16 bit)'''

||Bit 	||Function     ||
||0 	||LCD VBLEN    ||
||1 	||LCD NDISP    ||
||2 	||NAND NCE     ||
||3 	||NAND NRE     ||
||4 	||NAND NWP     ||
||5 	||NAND NWE     ||
||6 	||NAND ALE     ||
||7 	||NAND CLE     ||
||8 	||Mailboard power - provides +5V to mailboard when set||
||9 	||Output to mailboard DATA (open collector)||
||10 	||Smartcard - RSTIN (Inverted by a transistor on the smartcard board)||
||11 	||Smartcard - CMDVCC||
||12 	||Modem NRESET ||
||13 	||Modem CODEC - switches CX20442 codec digital inputs between the modem (=1) and the DSP (=0)||
||14 	||Hookflash? - The amstrad software produces a high pulse on this line when<<BR>>The phone is taken off hook or Recall is pressed||
||15 	||Hookflash? - As 14. Not sure why 2 pins are needed for this?||

'''There are also 16 bits of GPIO'''

||Bit 	||Function               ||
||0 	||Mailboard data (inverted) ||
||1 	||Mailboard clock (inverted)||
||2 	||MODEM IRQ              ||
||3 	||dockit                 ||
||4 	||Phone hook             ||
||5 	||Not available - no physical pin||
||6 	||Smartcard - NOFF||
||7 	||Smartcard - IO||
||8 	||Smartcard? (AUX1?)     ||
||9 	||Smartcard? (AUX2?)     ||
||10 	||Not available - no physical pin||
||11 	||PROC_CONFIG_0 - 0 = B&W LCD, 1 = colour LCD<<BR>>Connected to CONF 0 pads on PCB. 1-2 = colour 2-3 = B&W||
||12 	||NAND RB                ||
||13 	||Not available - physical pins used for keypad matrix ||
||14 	||Not available - physical pins used for keypad matrix ||
||15 	||Not available - physical pins used for keypad matrix ||


'''Camera Interface'''

The camera is connected to SK1 on the main board. This connector also contains the I2C bus signals.
<<BR>>Looking at the component side of the main board, with the external connectors (power, usb, serial) furthest from you, the pinout is as follows:

||GND||?||?||?||SCL||SDA||?||?||?||?||?||?||?||?||?||?||?||?||GND||+3.3V||