ES51991
11,000 Counts ADC
Buzzer ON
START BIT
A
C
K
STOP BIT
1
1
0 0 0
1
1
Buzzer OFF
START BIT
A
C
K
STOP BIT
1
1
0 0 0
1
0
D13-D0:
ADC output data. Binary code format.
5. Power and I/O output level selection
Power
Charge pump output for positive supply voltage(V+)
External DC source to V+ is available by floating the charge pump capacitor
I/O output level selectable
uP_VCC provided by external DC source (the same high level with MPU)
A control pin (I/O_control) selects the low level to –3V(V-) or 0V(DGND)
I/O level
uP_VCC I/O_control
Example
H
L
3
H
+3V
0V
Ex.1
3
L
+3V
-3V
Ex.2
0
L
0V
-3V
Ex.3
11
06/09/20
CYRUSTEK [ Cyrustek corporation ]
