Specifications

Q24 Series
Wireless CPU
®
Interfaces
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prior written agreement.
WM_PGM_Q24NG_PTS_001-005 November 20, 2007
3.5 e
An A mand Ope
®
t e
AT+CMER command descript u o e
application.
For a total of 25 keys (5 rows x 5 columns), the keyboard interface provides 10
conn :
• 5 rows (ROW0 to ROW4) and
d.
K yboard Interface
Equivalent circuit
Key
Key
T com or n AT
API allows the inpu key code to be obtained (see th
ion). This code m st then be pr cessed by th
ections
• 5 columns (COL0 to COL4)
The scanning is digital, and the debouncing is performed in the Wireless CPU
®
. No
discrete components such as R, C (Resistor, Capacitor) are neede
2V8
GND
2V8
Press
Detector
Row0 Col0
D
Q
COLUMN 0
COLUMN 4
Key Release
D
CLOCK
GND
COLUMN [0]
etector
Q D
ROW 0
ROW 4
ROWCK
R
c
Select
OW [0]
Sele t