PT6302_10 Datasheet, PDF (12/27 Pages) Princeton Technology Corp – VFD Driver/Controller IC with Character RAM

PT6302
ADRAM DATA WRITE COMMAND
The Additional Data RAM (ADRAM) consists of 4 address bits used to store the symbol data. It can store up to 2 types of
symbol patterns per digit. The symbol data specified by the ADRAM is directly outputted. The terminals to which the
ADRAM data are outputted may be used as a cursor. The ADRAM command format is given below.
LSB
MSB
1st Byte _{B0 B1 B2 B3 B4 B5 B6 B7} ADRAM Data Write Mode is selected and the
(1st)
X0 X1 X2 X3
1
1
0
0
ADRAM address is specified. (i.e. ADRAM Address
= 0H)
LSB
MSB
2nd Byte _{B0 B1 B2 B3 B4 B5 B6 B7} Symbol Data is specified and written into the ADRAM
(2nd)
C0 C1 *
*
*
*
*
* ^{Address 0H.}
During a continuous data write operation from one ADRAM Address to the next, it is not necessary to specify the
ADRAM address since they are automatically incremented; however, the symbol data must be specified. Please refer to
the information below.
LSB
MSB
2nd Byte _{B0 B1 B2 B3}
B4
B5 B6 B7 ^{Symbol Data is specified and written into the ADRAM}
(3rd)
Address 1H.
C0 C1 *
*
*
*
*
*
LSB
MSB
2nd Byte _{B0 B1 B2 B3 B4 B5 B6 B7} Symbol Data is specified and written into the ADRAM
(4th)
Address 2H.
C0 C1 *
*
*
*
*
*
:
:
LSB
MSB
2nd Byte _{B0 B1 B2 B3 B4 B5 B6 B7} Symbol Data is specified and written into the ADRAM
(17th)
C0 C1 *
*
*
*
*
* ^{Address FH.}
LSB
MSB
2nd Byte _{B0 B1 B2 B3 B4 B5 B6 B7} Symbol Data is specified and rewritten into the
(18th)
C0 C1 *
*
*
*
*
* ^{ADRAM Address 0H.}
where:
1. X0 (LSB) to X3 (MSB): ADRAM address bits (16 Characters)
2. C0 (LSB) to C1 (MSB): Symbol data bits (2 symbol data per digit)
V2.1
12
August 2010