Premicell 18i 20 way connector & RS-232

[dippywood]

I appear to be unable to source an AFW-3 RS-232 cable for my premicell 18i, so it would appear to be time to build one!

To this end, does anyone have details of either the cable or the 20-way connector? From elsewhere on this site I have been able to determine that, counting from the left, pin 6 on the upper bank is MBUS, and on the lower, ground, but this is about all that I can find.

Any further light that could be shed on this topic would be greatly appreciated!

Cheers,

Dave.

[dippywood]

Of course. I managed to find more information almost as soon as I posted the message, so to answer my own question before I ask another, in the hope that others might find it useful.

TOP
01 oooooooooo 10
20 oooooooooo 11

1 RS_RX Serial RX (Receive data for serial communication)

• ”0”; min/max 0...0.6 V
• ”1”; min/max 2.4...3.2 V

2 RS_TX Serial TX (Transmit data for serial communication)

• ”0”; min/max 0...0.6 V
• ”1”; min/max 2.4...3.2 V

3 SCK_RTS Serial Clock (Serial Clock for synchronous communication / RS_RTS)

• ”0”; min/max 0...0.6 V
• ”1”; min/max 2.4...3.2 V

4 WDDIS • ”0”; min/max 0...0.6 V Watchdog disable, Flash mode

• ”1”; min/max 2.4...7.15 V, Normal mode

5 PCMDCLK Audio Clock (512 kHz) clock for audio data

• ”0”; min/max 0...0.6 V
• ”1”; min/max 2.4...3.2 V

6 MBUS Serial control bus (General Purpose Control and Test Control Bus)

• ”0”; min/max 0...0.5 V
• ”1”; min/max 2.4...3.2 V

7 VPP Programming Voltage (Programming voltage is applied before entering the programming state)

• active; min/max 11.6...12.6 V
• inactive; min/max 0...3.2 V

8 DBUS_RXD DBUS Interface (Receive data for DAI)

• ”0”; min/max 0...0.6 V
• ”1”; min/max 2.4...3.2 V

9 DBUS_TXD DBUS Interface (Transmit data for DAI)

• ”0”; min/max 0...0.6 V
• ”1”; min/max 2.4...3.2 V

10 PCMSCLK Audio Clock (8 kHz slot clock for audio data)

• ”0”; min/max 0...0.6 V
• ”1”; min/max 2.4...3.2 V

11 VL Logic Supply Voltage (3 V Logic voltage)

• typical; 3.2 V

12 FBUS_TX FBUS TX (FBUS transmit)

• ”0”; min/max 0...0.5 V
• ”1”; min/max 2.4...3.2 V

13 FBUS_RX FBUS RX

• FBUS receive ”0”; min/max 0...0.6 V
• Pull–up on base band ”1”; min/max 2.4...3.2 V

14 VBATT Battery supply voltage

• min/max 6.45...7.15 V

15 DGND Digital ground

16 RS_CTS RS232 (Handshake signal for RS–232 serial interface)

17 HOOK_DTR Accessory detection

• active; min/max 0...0.5 V
• inactive; min/max 2.4...3.2 V

18 AGND Analog ground

19 XMIC_ID External Microphone Input (Audio in e.g. service handset)

• typical 200 mV

20 XEAR_DSR External Speaker (Audio out e.g. service handset)

Which about covers it, except, what to use for the level conversion from RS232? Is it possible to modify a commercially available lead for another Nokia phone to provide this.

I wish to use the AT command interface, a la AFW-3 rather than the binary interface in the manner of NDS/AFW-1.

[DonCordiale]

Hi,

Well, the thread is almost 7 years old, but has anyone managed to assemble a working homemade AFW-3 data cable for PremiCell 09i/18i?

Thanks in advance