FEDL9207-02

OKI Semiconductor

ML9207-xx

21/35

3. ADRAM data write

(Specifies the addresses 00H to 1FH of ADRAM and writes symbol data.)

ADRAM (Additional Data RAM) has a 5-bit address to store symbol data.

Symbol data specified by ADRAM is directly output without CGROM and CGRAM.

(The ADRAM can store 4 types of symbol patterns for each digit.)

The terminal to which the contents of ADRAM are output can be used as a cursor.

[Command format]

To specify symbol data continuously to the next address, specify only symbol data as follows.

The address of ADRAM is automatically incremented. Specification of addresses is therefore unnecessary.

B0 B1 B2 B3 B4 B5 B6 B7

2nd byte

(2nd)

LSB

MSB

: Sets symbol data

(written into ADRAM address 00H.)

X0 X1 X2 X3 X4 1

1

0

B0 B1 B2 B3 B4 B5 B6 B7

1st byte

(1st)

LSB

MSB

: Selects ADRAM data write mode and specifies ADRAM

address

(Ex: Specifies ADRAM address 00H.)

B0 B1 B2 B3 B4 B5 B6 B7

2nd byte

(3rd)

LSB

MSB

: Sets symbol data

(written into ADRAM address 01H)

B0 B1 B2 B3 B4 B5 B6 B7

2nd byte

(4th)

LSB

MSB

: Sets symbol data

(written into ADRAM address 02H)

B0 B1 B2 B3 B4 B5 B6 B7

2nd byte

(25th)

LSB

MSB

: Sets symbol data

(written into ADRAM address 17H)