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