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ML9208-XXGA

5 x 7 Dot Character x 16-Digit Display Controller/Driver with Character RAM

LAPIS Semiconductor Co., Ltd. 

FEDL9208-02

ML9208

2. CGRAM data write

(Specifies the addresses of CGRAM and writes character pattern data.)

CGRAM (Character Generator RAM) has a 3-bit address to store 5  7 dot matrix character patterns.

A character pattern stored in CGRAM can be displayed by specifying the character code (address) by

DCRAM.

The address of CGRAM is assigned to 00H to 07H. (All the other addresses are the CGROM addresses.)

(The CGRAM can store 8 types of character patterns.)

[Command format]

1st byte

(1st)

2nd byte

(2nd)

LSB

MSB

B0 B1 B2 B3 B4 B5 B6 B7

X0 X1 X2 * 0 1 0 0

LSB

MSB

B0 B1 B2 B3 B4 B5 B6 B7

C0 C5 C10C15C20C25C30 *

: selects CGRAM data write mode and specifies

CGRAM address.

(Ex: specifies CGRAM address 00H)

: specifies 1st column data

(rewritten into CGRAM address 00H)

3rd byte

(3rd)

LSB

MSB

B0 B1 B2 B3 B4 B5 B6 B7

C1 C6 C11C16C21C26C31 * : specifies 2nd column data

(rewritten into CGRAM address 00H)

4th byte

(4th)

LSB

MSB

B0 B1 B2 B3 B4 B5 B6 B7

C2 C7 C12C17C22C27C32 * : specifies 3rd column data

(rewritten into CGRAM address 00H)

5th byte

(5th)

LSB

MSB

B0 B1 B2 B3 B4 B5 B6 B7

C3 C8 C13C18C23C28C33 * : specifies 4th column data

(rewritten into CGRAM address 00H)

6th byte

(6th)

LSB

MSB

B0 B1 B2 B3 B4 B5 B6 B7

C4 C9 C14C19C24C29C34 * : specifies 5th column data

(rewritten into CGRAM address 00H)

To specify character pattern data continuously to the next address, specify only character pattern data as

follows.

The addresses of CGRAM are automatically incremented. Specification of an address is therefore

unnecessary.

The 2nd to 6th byte (character pattern data) are regarded as one data item, so 250 ns is sufficient for tDOFF time

between bytes.

17/33

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