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

Unknown, but seems to be connected to a transistor near the modem/telephone ciruit

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 whenBRThe 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 LCDBRConnected 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