MC3401A/3411A
SCANNING AND DISPLAY TIMING
The Key Scanning and display timing diagram is given below. One cycle of key scanning consists of 2 frames. The
data of the 16 x 2 matrix is stored in the RAM.
Internal Operating Frequency (fosc) = 224/T
TDISPLAY = 500us
Key Scan Data
T
SGn
1 2 …. 8
9 10 …. 16
G1
G2
G3
Gn
Note : T is the width of segment only
1 Frame = TDISPLAY × (n+1)
February 28, 2013 Ver. 1.10
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