HT1625
The following are the data mode ID and the command
mode ID:
Operation
READ
WRITE
READ-MODIFY-WRITE
COMMAND
Name
TONE OFF
TONE 4K
TONE 2K
Mode
Data
Data
Data
Command
Command Code
0000-1000-X
010X-XXXX-X
0110-XXXX-X
Turn-off tone output
Turn-on tone output, tone frequency is 4kHz
Turn-on tone output, tone frequency is 2kHz
ID
110
101
101
100
Function
If successive commands have been issued, the com-
mand mode ID can be omitted. While the system is op-
erating in the non-successive command or the
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.
Timing Diagrams
READ mode (command code : 1 1 0)
C S
W R
R D
D A T A
1
1
0
A 6
A 5
A 4
A 3
A 2
A 1
A 0
D 0
D 1
D 2
D 3
1
1
0
A 6
A 5
A 4
A 3
A 2
A 1
A 0
D 0
D 1
D 2
D 3
M e m o ry A d d re s s 1 (M A 1 )
D a ta (M A 1 )
M e m o ry A d d re s s 2 (M A 2 )
D a ta (M A 2 )
READ mode (successive address reading)
C S
W R
R D
D A T A
1
1
0
A 6
A 5
A 4
A 3
A 2
A 1
A 0
D 0
D 1
D 2
D 3
D 0
D 1
D 2
D 3
D 0
D 1
D 2
D 3
D 0
D 1
D 2
D 3
D 0
M e m o ry A d d re s s (M A )
D a ta (M A )
D a ta (M A + 1 )
D a ta (M A + 2 )
D a ta (M A + 3 )
Rev. 1.10
9
September 11, 2002
ETC [ ETC ]
