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3. TECHNICAL BRIEF
- 57 -
3.11.4. Key Pad
There are 23 main key buttons in Figure.
Shows the Keypad circuit. ‘END’ Key is connected to PMIC(PM6650).
Table. Key Matrix Mapping Table
Figure 1.19 Main Keypad Circuit
Figure 1.20 END Keypad Circuit
COL0 COL1 COL2 COL3 COL4
ROW(0) - CLR MENU
ROW(1) 1 2 3 LEFT UP
ROW(2) 4 5 6 OK RIGHT
ROW(3) 7 8 9 SEND SEARCH
ROW(4) * 0 # DOWN BACK
7
HOT3
4
2
8
1
6
9
HOT4
5
0
3
KEY MAP
OK
UP401 LEFT
405404
400
SEARCH
HOT400
403
SND
BACK
406
R423
100K
407
DN
MENU
408
RIGHT
100K
2
4
6
8
1
3
5
7
RA400
HOT401
CLR
402
409
KEY_ROW(4)
KEY_ROW(3)
KEY_ROW(2)
KEY_ROW(1)
KEY_ROW(0)
KEY_COL(0)
KEY_COL(1)
KEY_COL(2)
KEY_COL(4)
KEY_COL(3)
VREG_MSMP_2.7V
END
END
PM_ON_SW_N