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ES51999 Datasheet(PDF) 4 Page - Cyrustek corporation

Part No. ES51999
Description  4 3/4 and 5 3/4 A/D AUTO
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Maker  CYRUSTEK [Cyrustek corporation]
Homepage  http://www.cyrustek.com.tw
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ES51999 Datasheet(HTML) 4 Page - Cyrustek corporation

 
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07/07/06
4
ES51999
4 3/4 and 5 3/4 A/D AUTO
Pin No.
Symbol
Type Description
17
OVX
I
Input high voltage for resistance measurement.
18
OVH
I
Output connection for resistance measurement.
20
OVSG
I
Sense low voltage for resistance measurement.
21
OR1
O
Reference resistor connection for 399.9Ω range.
22
VR5
O
Voltage measurement ÷ 10000 attenuator (4000V.)
23
VR4
O
Voltage measurement ÷ 1000 attenuator (400.0V.)
24
VR3
O
Voltage measurement ÷ 100 attenuator (40.00V.)
25
VR2
O
Voltage measurement ÷ 10 attenuator (4.000V.)
27
SGND
G
Signal Ground.
29
VR1
I
Measurement input.
31
V400m
I
400mV independent input.
37
VRH
O
Output of band-gap voltage reference. Typically -1.2V
38
VR
O
Reference input voltage connection. Typically -200mV
46
FREQ
I
Frequency counter input, offset to V-/2
48
BUZIN
I
Enables the buzzer. Low action.
49
BUZOUT
O
Outputs a 2KHz audio frequency signal for driving piezoelectric buzzer
when BUZIN is low.
50
OSC1
I
Crystal oscillator input connection.
51
OSC2
O
Crystal oscillator output connection.
52
EOC
O
End of conversion indicator
53
VCC
I
The high level of digital I/O signals, which is connected to VCC pin of
microprocessor.
54
STATUS
I/O
ES51966 sends current status to microprocessor or receives controlled
status from microprocessor.
55
SCLK
I
Clock input from microprocessor.
56
OSC4M
I
Crystal oscillator selection. NC for 4MHz; connect to V- for 10MHz.
57
V-
P
Negative supply voltage, connected to cathode of battery typically..
58
V-
P
Negative supply voltage, connected to cathode of battery typically.
59
DGND
G
Digital Ground ( Output of on-chip DC-DC converter ),
V
DGND = ( V+ - V- ) / 2
60
AGND
G
Analog Ground
61
AGND
G
Analog Ground
62
V+
P
Positive supply voltage
63
V+
P
Positive supply voltage
64
LBATT
I
Low battery voltage detection
Pin No. :
8 , 16 , 19 , 26 , 28 , 30 , 32-36 ,
39-45 , 47
No connected
P: Power,
G: Ground,
I: Input,
O: Output


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