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ES51918P Datasheet(PDF) 4 Page - Cyrustek corporation

Part # ES51918P
Description  11,000 Counts Auto DMM
Download  32 Pages
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Manufacturer  CYRUSTEK [Cyrustek corporation]
Direct Link  http://www.cyrustek.com.tw
Logo CYRUSTEK - Cyrustek corporation

ES51918P Datasheet(HTML) 4 Page - Cyrustek corporation

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v1.08
06/04/03
4
ES51918
11,000 Counts Auto DMM
44
SLEEP
O
Sleep mode indicator, asserts low in SLEEP mode.
45
FREQ
I
Frequency counter input, offset V-/2 internally by the chip.
46
RS232
I
Assert low to enable serial data output.
47
OHMC2
O
Filter capacitor connection for resistance mode.
48
OHMC3
O
Filter capacitor connection for resistance mode.
49 - 66 SEG18 – SEG01
O
LCD segment line 01 – 18
67
BP4
O
LCD backplane 4
68
BP3
O
LCD backplane 3
69
BP2
O
LCD backplane 2
70
BP1
O
LCD backplane 1
71
ANNUNC
O
Square wave output at the backplane frequency, synchronized to
BP1. ANNUNC can be used to control display annunciator. Connect a
LCD segment to ANNUNC to turn it on; connect an LCD segment to
its backplane to turn it off.
72
BUZIN
I
Pull to V- to enable the BUZOUT.
73
BUZOUT
O
Outputs a 2KHz audio frequency signal for driving piezoelectric buzze
when BUZIN is low.
74
BKOUT
O
If BKLIT function is enabled, this pin will change from –3V to +3V
For 60 sec, once press BKLIT pin again within 60 sec, this pin will
Change back to –3V.
75
MAXMIN
I
Pulse to V- to enable MAX/MIN function.
76
VAHZ
I
Pulse to V- to enable VAHZ mode.
77
PEAK
I
Pulse to V- to enable Peak Hold mode.
78
REL_ZERO
I
Pulse to V- to enable Relative function or Zero function.
79
HOLD
I
Pulse to V- to enable HOLD function.
80
RANGE
I
Pulse to V- to enable manual mode and manual range selection.
81
OSC1
I
Crystal oscillator input connection
82
OSC2
O
Crystal oscillator output connection
83
APOSEL
I
Idle time selection for auto power off feature.
84
CESEL
I
CE selection feature control pin.
85
BKLIT
I
Back light function. Pulse low to set BKOUT pin output.
86
KEY
I
Pulse to V- to change mode. In ADP mode, if this pin is connected to
V-, the buzzer output will be off when the ADP input overflows.
87
SLACDC
I
Select initial state. Please refer to page 15
88
FC5
I
Switch 5 for function selection.
89
FC4
I
Switch 4 for function selection.
90
FC3
I
Switch 3 for function selection.
91
FC2
I
Switch 2 for function selection.
92
FC1
I
Switch 1 for function selection.
93
LBAT9
I
Low battery configuration. If 3V battery is used, connect it to AGND.
The default low-battery threshold voltage is –2.3V. If 9V battery is
Used, the low battery annunciator is displayed when the voltage of
this pin is less than VRH (-1.2V)
94
SDO
O
RS232 compliant serial data output.
95
C+
O
Positive capacitor connection for on-chip DC-DC converter.
96
C-
O
Negative capacitor connection for on-chip DC-DC converter.
97
V-
P
Negative supply voltage. Connecting to 3V battery negative terminal.
98
DGND
P/G Digital ground. Connecting to 3V battery positive terminal.
99
AGND
P/G Analog ground.
100
AGND
P/G Analog ground.


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