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LC75712E View Datasheet(PDF) - SANYO -> Panasonic

Part Name
Description
View to exact match
LC75712E
SANYO
SANYO -> Panasonic SANYO
LC75712E Datasheet PDF : 21 Pages
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LC75710NE, 75711NE, 75712E
Block Functions
1. AC (address counter)
AC is a counter that provides addresses for DCRAM and ADRAM.
The address is modified automatically by internal operations to maintain the VFD display state.
2. DCRAM (data control RAM)
DCRAM is RAM that holds the display data, which is expressed as 8-bit character codes. (These character codes are
converted to 5 × 7 dot matrix patterns using the CGROM and CGRAM memories.) DCRAM has a capacity of 64 × 8
bits, and can hold the data for 64 characters. The relationship between the 6-bit DCRAM address in AC and the
display position on the VFD display is described below.
• When the DCRAM address in AC is 00H. (16 digits displayed)
Display digit
DCRAM address (hexadecimal)
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
0F 0E 0D 0C 0B 0A 09 08 07 06 05 04 03 02 01 00
However, the DCRAM address moves as follows when a display shift is performed by specifying MDATA.
Display digit
DCRAM address (hexadecimal)
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Right shift
10 0F 0E 0D 0C 0B 0A 09 08 07 06 05 04 03 02 01
Display digit
DCRAM address (hexadecimal)
16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
Left shift
0E 0D 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 3F
Note: The 6-bit DCRAM addresses are expressed in hexadecimal.
3. ADRAM (additional data RAM)
ADRAM is RAM used to store ADATA display data. ADRAM has a 16 × 8-bit capacity and the stored display data
is output directly without using CGROM and CGRAM. The relationship between the 4-bit ADRAM address in AC
and the display position on the VFD display is described below.
• When the ACRAM address in AC is 0H. (16 digits displayed)
Display digit
ADRAM address (hexadecimal)
16 15 14 13 12 11 10 9 8 7 6 5 4 3
F E DCB A 9 8 7 6 5 4 3 2
21
10
However, the ADRAM address moves as follows when a display shift is performed by specifying ADATA.
Display digit
ADRAM address (hexadecimal)
16 15 14 13 12 11 10 9 8 7 6 5 4 3
0 F EDCBA 9 8 7 6 5 4 3
21
Right shift
21
Display digit
ADRAM address (hexadecimal)
16 15 14 13 12 11 10 9 8 7 6 5 4 3
ED CB A 9 8 7 6 5 4 3 2 1
21
Left shift
0F
Note: DCRAM and ADRAM addresses are expressed in hexadecimal.
DCRAM address
MSB
LSB
DA5 DA4 DA3 DA2 DA1 DA0
ADRAM address
Hexadecimal
Hexadecimal
MSB
LSB
RA3 RA2 RA1 RA0
Hexadecimal
Example: When the DCRAM address is 3EH.
DA5 DA4 DA3 DA2 DA1 DA0
1
1
1
1
1
0
No. 4907-6/21
 

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