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VFD Driver/Controller IC
PT6315
PT6315 v2.0
Page 7
Sep. 2002
Display Mode and RAM Address
Data transmitted from an external device to PT6315 via the serial interface are stored in the
Display RAM and are assigned addresses. The RAM Addresses of PT6315 are given below in 8
bits unit.
SG1
SG4 SG5
SG8 SG9 SG12 SG13 SG16 SG17 SG20 SG21 SG24
Figure 4: PT6315 RAM Address
DIG1
DIG2
DIG3
DIG4
DIG5
DIG6
DIG7
DIG8
DIG9
DIG10
DIG11
DIG12
xxH
L
xxH
U
b0 b3 b4 b7
Lower 4 bits Higher 4 bits
0 0 H
L
0 0 H
U
0 1 H
L
0 1 H
U
0 2 H
L
0 2 H
U
0 3 H
L
0 3 H
U
0 4 H
L
0 4 H
U
0 5 H
L
0 5 H
U
0 6 H
L
0 6 H
U
0 7 H
L
0 7 H
U
0 8 H
L
0 8 H
U
0 9 H
L
0 9 H
U
0 A H
L
0 A H
U
0 B H
L
0 B H
U
0 C H
L
0 C H
U
0 D H
L
0 D H
U
0 E H
L
0 E H
U
0 F H
L
0 F H
U
1 0 H
L
1 0 H
U
1 1 H
L
1 1 H
U
1 2 H
L
1 2 H
U
1 3 H
L
1 3 H
U
1 4 H
L
1 4 H
U
1 5 H
L
1 5 H
U
1 6 H
L
1 6 H
U
1 7 H
L
1 7 H
U
1 8 H
L
1 8 H
U
1 9 H
L
1 9 H
U
1 A H
L
1 A H
U
1 B H
L
1 B H
U
1 C H
L
1 C H
U
1 D H
L
1 D H
U
1 E H
L
1 E H
U
1 F H
L
1 F H
U
2 0 H
L
2 0 H
U
2 1 H
L
2 1 H
U
2 2 H
L
2 2 H
U
2 3 H
L
2 3 H
U