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ES51921 датащи(PDF) 4 Page - Cyrustek corporation

номер детали ES51921
подробное описание детали  22,000 Counts Auto DMM
Download  35 Pages
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производитель  CYRUSTEK [Cyrustek corporation]
домашняя страница  http://www.cyrustek.com.tw
Logo CYRUSTEK - Cyrustek corporation

ES51921 датащи(HTML) 4 Page - Cyrustek corporation

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Ver. 3.2
10/06/23
4
ES51921
22,000 Counts Auto DMM
47
CA+
IO
Positive auto-zero capacitor connection for capacitor measurement
48
R9K
O
Connect to a precise 9KΩ resister for capacitor measurement.
49
R1K
O
Connect to a precise 1KΩ resister for capacitor measurement.
50
NC
51
NC
52
LPFC1
O
Capacitor C1 connection for internal low-pass filter
53
LPFC2
O
Capacitor C2 connection for internal low-pass filter
54
LPFOUT
O
Capacitor C1 connection for internal low-pass filter
55
LPFON
I
Pull to V- to enable low-pass filter
56
LPFC3
I
Capacitor C3 connection for internal low-pass filter
57
BUZIN
I
Pull to V- to enable the BUZOUT.
58
SLEEP
O
Sleep mode indicator, asserts low in SLEEP mode.
59
FREQ
I
Frequency counter input, offset V-/2 internally by the chip.
60
NC
61 - 90 SEG31 – SEG01
O
LCD segment line 01 – 31
91
BP4
O
LCD backplane 4
92
BP3
O
LCD backplane 3
93
BP2
O
LCD backplane 2
94
BP1
O
LCD backplane 1
95
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.
96
HOLD
I
Pulse to V- to enable HOLD function.
97
RANGE
I
Pulse to V- to enable manual mode and manual range selection.
98
REL_ZERO
I
Pulse to V- to enable Relative function or Zero function.
99
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.
100
MAX/MIN
I
Pulse to V- to enable MAX/MIN function.
101
NC
102
BKLIT
I
Back light function. Pulse low to set BKOUT pin output.
103
VAHZ
I
Pulse to V- to enable VAHZ mode.
104
BUZOUT
O
Outputs a 2KHz audio frequency signal for driving piezoelectric
buzzer when BUZIN is low.
105
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.
106
OSC2
O
Crystal oscillator output connection
107
OSC1
I
Crystal oscillator input connection
108
SCLK
I
Clock signal input for programmable LCD segment display.
109
SDATA
I
Serial data input pin for programmable LCD segment display.
110
μPLCD
I
Enable pin for programmable LCD segment display and SDO output
enable
111
RS232
I
Assert low to enable serial data output.
112
APOSEL
I
Idle time selection for auto power off feature.
113
BKSEL
I
Set to V- to change the backlight idle time from 60 sec. to 180 sec.
114
VST
I
Set to V- to enable the auto range voltage mode to start from 220.00V
range.
115
SHIFT
I
Assert low to enable LCD SHIFT future, only works in 220MΩ, and
all capacitor measurement ranges
116
CESEL
I
CE selection feature control pin.
117
SLACDC
I
Select initial state.
118
FC5
I
Switch 5 for function selection.
119
FC4
I
Switch 4 for function selection.
120
FC3
I
Switch 3 for function selection.


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