參數(shù)資料
型號(hào)： HD66712SA02FS
廠商： Hitachi,Ltd.
英文描述： Dot-Matrix Liquid Crystal Display Controller/Driver
中文描述： 點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器
文件頁數(shù)： 49/88頁
文件大?。?/td> 662K
代理商： HD66712SA02FS
HD66712U
412
Table 12
Instructions (cont)
RE
Code
Execution
Time (max)
(when f
cp
or
f
OSC
is
270 kHz)
Instruction Bit
RS
R/
:
DB7 DB6 DB5 DB4 DB3
DB2
DB1
DB0
Description
Set
DDRAM
address
0
0
0
1
ADD ADD ADD ADD
ADD
ADD
ADD
Sets DDRAM address.
DDRAM data is sent and
received after this
setting.
37 μs
Set scroll
quantity
1
0
0
1
*
HDS HDS HDS
HDS
HDS
HDS
Sets horizontal dot scroll
quantity.
37 μs
Read busy
flag &
address
0/1
0
1
BF
AC
AC
AC
AC
AC
AC
AC
Reads busy flag (BF)
indicating internal
operation is being
performed and reads
address counter
contents.
0 μs
Write data
to RAM
0/1
1
0
Write data
Writes data into
DDRAM, CGRAM, or
SEGRAM.
7 μs
t
ADD
= 5.5 μs*
Read data
from RAM
0/1
1
1
Read data
Reads data from
DDRAM, CGRAM, or
SEGRAM.
37 μs
t
ADD
= 5.5 μs*
I/D
I/D
S
D
C
B
FW = 1: 6-dot font width
B/W = 1: Black-white inverting cursor on
NW = 1: Four lines
NW = 0: One or two lines
S/C = 1: Display shift
S/C = 0: Cursor move
R/L = 1: Shift to the right
R/L = 0: Shift to the left
DL
= 1: 8 bits, DL = 0: 4 bits
N
= 1: 2 lines, N = 0: 1 line
RE
= 1: Extension register access enable
BE
= 1: CGRAM/SEGRAM blinking enable
LP
= 1: Low-power mode
BF
= 1: Internally operating
BF
= 0:
Instructions acceptable
1. — indicates no effect.
* After execution of the CGRAM/DDRAM data write or read instruction, the RAM address
counter is incremented or decremented by 1. The RAM address counter is updated after the
busy flag turns off. In Figure 17, t
ADD
is the time elapsed after the busy flag turns off until the
address counter is updated.
2. Extension time changes as frequency changes. For example, when f is 300 kHz, the execution
time is: 37 μs
×
270/300 = 33 μs.
3. Execution time in a low-power mode (LP = 1 and EXT = low) becomes four times for a 1-line
mode, and twice for a 2- or 4-line mode.
= 1: Increment
= 0: Decrement
= 1: Accompanies display shift
= 1: Display on
= 1: Cursor on
= 1: Blink on
DDRAM:
ADD:
Display data RAM
DDRAM address
(corresponds
to cursor address)
Character generator RAM
CGRAM address
SEGRAM: Segment RAM
ASEG:
Segment RAM address
HSE:
Specifies horizontal scroll
lines
HDS:
Horizontal dot scroll
quantity
AC:
Address counter used for
both DD, CG, and
SEGRAM addresses.
CGRAM:
ACG:
Note:
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