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Nokia R40 Hardware ald Connections
Page 5 of6
t n t s
picture shows the four large chips which
d r i v e t h e h u g e d i s p l a y .
The head varies in component occupancy
and layout throughout various models.
The one shown here has more
components than others I've seen.
ïhis, I believe may possibly be the head
unit wiring (Note the mistake with the
n u m b e r i n g ) . T h e h e a d u n i t m a t i n g
connectors and also the extension cable
use D15 connectors. Internally there is a
15 way ribbon cable.
1 SCL
2 SDA
3 I2C.INT
4 V S
5 HOOK
6 AGND
7 M I C
8 MIC-OUT
9 PTT
10 oN_oFF
11 GND-DIGIT
12 LSP
13 EMERG_PTT
14 GND-ANALOG
16 HF-MIC-OUT
1 6 N C
T h e ' R e d H e a d ' i s u s e d t o c o n f i g u r e t h e
radio and is also required to run the
software. This, apart from its striking
colour, is not dis-similar to the standard
cU42 head. To upgrade a CU42 head to
service level, a binary is programmed into
an EEPRoM and then the EEPROM is
soldered into place in the head. A resistor
is also added. You might then want to
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