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Switching
Acknowledgment
of switching
20 msec
[f_mderr_rq]
Flag for Mode error
LED Warning
ILL lights if it is off
Mode error LED
warning
Key disabled
Relay
10 msec
ILL processing
Silent mode
Fig.8 Timing of mode switching error processing
DAC8043FP (INPUT(L) ASSY : IC101, INPUT(R) ASSY : IC201)
• D/A Converter IC
•
Pin Assignment (Top View)
V
1
REF
R
2
FB
I
3
OUT
GND
4
•
Block Diagram
V
1
REF
5
LD
CLK
7
SRI
6
Switching
(restoring the original setting)
20 msec
200 msec
V
5
DD
CLK
6
7
SRI
8
LD
12-BIT
D/A CONVERTER
12
12-BIT
DAC REGISTER
12
12-BIT INPUT
SHIFT REGISTER
7.3 Warning when switching ATT.THROUGH from
OFF to ON
When ATT.THROUGH is switched from OFF to ON, the key
becomes valid when it is held pressed for 2 seconds.
The ATT.THROUGH ON/OFF LED flashes during those 2 seconds.
IC901 PD5508B9
2
R
FB
R
FB
3
I
OUT
V
8
DD
4
GND
M-AX10
51
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