Nokia RH-18 - Keyboard

CCS Technical Documentation Engine module
Company confidential RH-18/36/38
Issue 1 10/03 Nokia Corporation. Page 23
Keyboard
The keyboard PWB layout consists of a grounded outer ring and an inner pad.
Power key is integrated in keypad. For the schematic diagram of the keyboard kindly refer
to the A3 schematic diagrams.
Table 17: Keyboard configuration
All lines are configured as input, when there is no key pressed.
When a key is pressed, the specific line where the key is placed is pulled low. This gener-
ates an interrupt to the MCU and the MCU now starts its scanning procedure.
When the key has been detected all the keypad-register inside the UPP is reset and it's
ready receiving new interrupt.
UPP Pin Pad symbol
In/
Out
Internal
Pull
Up/down
Interrupt
GenIO1 0 In Up GenIOInt5 Falling edge interrupt
GenIO2/P05 7 In Up P0 int Falling edge interrupt
GenIO20 # In Up GenIOInt2 Falling edge interrupt
GenIO21 * In Up GenIOInt3 Falling edge interrupt
GenIO25 Up In Up GenIOInt4 Falling edge interrupt
GenIO27 1 In Up GenIOInt6 Falling edge interrupt
P00 Menu/(End) In Up P0 int Falling edge interrupt
P01 3 In Up P0 int Falling edge interrupt
P02 9 In Up P0 int Falling edge interrupt
P03 8 In Up P0 int Falling edge interrupt
P04 Down In Up P0 int Falling edge interrupt
P10 6 In Up P1 int Falling edge interrupt
P11 4 In Up P1 int Falling edge interrupt
P13 5 In Up P1 int Falling edge interrupt
P14 C/(Send) In Up P1 int Falling edge interrupt
P15 2 In Up P1 int Falling edge interrupt