FD2000

Rev1.0

17/37

10.4. SET AC ADDRESS ― Specifies the DCRAM and ADRAM address for AC

Code

D48

D49

D50

D51

D52

D53

D54

D55

D56

D57

D58

D59

D60

D61

D62

D63

DA0

DA1

DA2

DA3

DA4

DA5

X

X

RA0

RA1

RA2

RA3

0

1

0

0

X: don’t care

10.4.1. DA0 to DA5: DCRAM address

DA0

DA1

DA2

DA3

DA4

DA5

LSB

MSB

10.4.2. RA0 to RA3: ADRAM address

RA0

RA1

RA2

RA3

LSB

MSB

This instruction loads the 6-bit DCRAM address DA0 to DA5 and the 4-bit ADRAM address RA0 to RA3 into the

AC.

Code

D40 D41 D42 D43 D44 D45 D46 D47 D48 D49 D50 D51 D52 D53 D54 D55 D56 D57 D58 D59 D60 D61 D62 D63

AC0 AC1 AC2 AC3 AC4 AC5 AC6 AC7 DA0 DA1 DA2 DA3 DA4 DA5

X

X

IM

X

X

X

0

1

0

1

X: don’t care

10.5.1. DA0 to DA5: DCRAM address

DA0

DA1

DA2

DA3

DA4

DA5

LSB

MSB

10.5.2. AC0 to AC7: DCRAM data (character code)

AC0

AC1

AC2

AC3

AC4

AC5

AC6

AC7

LSB

MSB

This instruction writes the 8 bits of data AC0 to AC7 to DCRAM. This data is a character code, and is converted to

a 5 x 7, 5 x 8, or 5 x 9 dot matrix display data using CGROM or CGRAM.

10.5.3. IM: Setting the method of writing data to DCRAM

IM

DCRAM data write method

0

Normal DCRAM data write (Specifies the DCRAM address and writes the DCRAM data.)

1

Increment mode DCRAM data write (Increments the DCRAM address by +1 each time data is written to DCRAM.)