FD2000
Rev1.0
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
LSB
DA1
DA2
DA3
DA4
DA5
MSB
10.4.2. RA0 to RA3: ADRAM address
RA0
LSB
RA1
RA2
RA3
MSB
This instruction loads the 6-bit DCRAM address DA0 to DA5 and the 4-bit ADRAM address RA0 to RA3 into the
AC.
10.5. DCRAM DATA WRITE ― Specifies the DCRAM address and stores data at that address
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
LSB
DA1
DA2
DA3
DA4
DA5
MSB
10.5.2. AC0 to AC7: DCRAM data (character code)
AC0
LSB
AC1
AC2
AC3
AC4
AC5
AC6
AC7
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
0
DCRAM data write method
Normal DCRAM data write (Specifies the DCRAM address and writes the DCRAM data.)
Increment mode DCRAM data write (Increments the DCRAM address by +1 each time data is written to DCRAM.)
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