AD6315
1/4- to 1/12 Duty VFD Controller/Driver
(5) Key Scanning And Display Timing
TDISP ≅ 500µs
Key scan data
SEG output
DIG1
DIG2
DIG3
DIGn
DIG1
G1
G2
G3
1/16TDISP
Gn
1 frame = TDISP X (n + 1 )
Note : One cycle of key scanning consists of two frame, and data in 1 16 X 2 matrix is stored in RAM.
(6) Key Scan Expansion
1st frame
2nd frame
1
9
2
3
4
5
6
7
8
DIGn
DIG1
10 11 12 13 14 15 16
(7) Serial Communication Format
Reception (command/data write)
If data continues
STB
DIN
b0
b1
b2
b6
b7
CLK
1
2
3
7
8
Anachip Corp.
www.anachip.com.tw
Rev. A5 Dec 29, 2003
10/16