HT1622
Command Format
If successive commands have been issued, the com-
mand mode ID can be omitted. While the system is op-
The HT1622 can be configured by the software setting.
There are two mode commands to configure the
HT1622 resource and to transfer the LCD display data.
erating in
a non-successive command or a
non-successive address data mode, the CS pin should
be set to ²1² and the previous operation mode will be re-
set also. The CS pin returns to ²0², a new operation
mode ID should be issued first.
The following are the data mode ID and the command
mode ID:
Operation
Mode
Data
ID
READ
1 1 0
1 0 1
1 0 1
1 0 0
WRITE
Data
READ-MODIFY-WRITE
COMMAND
Data
Command
Name
TONE OFF
TONE 4K
TONE 2K
Command Code
0000-1000-X
Function
Turn-off tone output
010X-XXXX-X
0110-XXXX-X
Turn-on tone output, tone frequency is 4kHz
Turn-on tone output, tone frequency is 2kHz
Timing Diagrams
READ Mode (Command Code : 1 1 0)
C
W
R
D
S
R
D
A
0
A
5
A
3
A
2
D
2
D
3
0
A
5
A
3
A
2
D 2
D 3
1
A
4
A
1
A
0
D
0
D
1
A
4
A
1
A
0
D
0
D
1
1
1
1
T
A
M
e
m
o
r
y
A
d
d
r
e
s
s
1
(
M
A
1
)
D
a
t
a
(
M
A
1
)
M
e
m
o
r
y
A
d
d
r
e
s
s
2
(
M
A
2
)
D
a
t
a
(
M
A
2
)
READ Mode (Successive Address Reading)
C
W
R
D
S
R
D
A
0
A
5
A
3
A
2
D
2
D
3
D
2
D
3
D
2
D
3
D 2
D 3
1 D
A
4
A
1
A
0
D
0
D
1
D
0
D
1
D
0
D
1
D
0
D
0
1
1
T
A
M
e
m
o
r
y
A
d
d
r
e
s
s
(
M
A
)
D
a
t
a
(
M
A
)
D
a
t
a
(
M
A
+
1
)
D
a
t
a
(
M
A
+
2
)
D
a
t
a
(
M
A
+
3
)
Rev. 1.40
7
February 6, 2007
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
