4*4 Matrix Keyboard Module - Qianglongsheng Electronic Technology MCD-DEMO-II Manual

DEMO-II Copyright of Qianlongsheng Electronics Technology (Shenzhen) Co., Ltd.
4.4 4*4 Matrix Keyboard
The module has the following main components:
1) 16 keys.
2) coding switching.
3) interface socket.
4) up-pull resistance.
Descriptions on this module are as below:
1) 16 keys connected to the 8 pins in accordance with the mode 4x4 PORTC.
2) the module is controlled by the coding switch. When it is not used, it is recommended to disconnect the switches so as
not to affect other modules.
3) you can practice the application by using the keyboards from other matrix through interface socket (coding switch
must be at a disconnected status).
4) there's a 10K Omiga up-pull resistor to ensure that the level of voltage keeps stable.
5) in the CD-ROM provided along with product, there're simple examples about "4x4 keyboard matrix".
S3
RC 0 16
RC 1 15
RC 2 14
RC 3 13
RC 4 12
RC 5 11
RC 6 10
RC 7 9
SW DIP-8
J7
8
7
6
5
4
3
2
1
4x4 matrix keyboard
1
2
3 K1
4
5
6 K5
7
8
K9
K13
10K*8
4*4 matrix keyboard schematic
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K2
K6
K10
K14
VC C
J8
K3 K4
K7 K8
K11 K12
K15 K16