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 |
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 |
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.
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 |