ST7032
l Function Set
RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
00
0 0 1 DL N DH 0 IS
Ø DL : Interface data length control bit
When DL = "High", it means 8-bit bus mode with MPU.
When DL = "Low", it means 4-bit bus mode with MPU. So to speak, DL is a signal to select 8-bit or 4-bit
bus mode.
When in 4-bit bus mode, it needs to transfer 4-bit data by two times.
Ø N : Display line number control bit
When N = "High", 2-line display mode is set.
When N = "Low", it means 1-line display mode.
Ø DH : Double height font type control bit
When DH = " High " and N= “Low”, display font is selected to double height mode(5x16 dot),RAM address
can only use 00H~27H.
When DH= “High” and N= “High”, it is forbidden.
When DH = " Low ", display font is normal (5x8 dot).
N
DH
EXT option pin connect to high
Display Lines Character Font
EXT option pin connect to low
Display Lines Character Font
L
L
1
5x8
1
5x8
LH
1
5x8
1
5x16
HL
2
5x8
2
5x8
HH
2
5x8
Forbidden
2 line mode normal display (DH=0/N=1)
1 line mode with double height font (DH=1/N=0)
Ø IS : normal/extension instruction select
When IS=” High”, extension instruction be selected (refer extension instruction table)
When IS=” Low”, normal instruction be selected (refer normal instruction table)
V1.4
23/61
2008/08/18