ES278 Datasheet, PDF (4/25 Pages) Cyrustek corporation – 4000 Counts Manual DMM

ES278
4000 Counts Manual DMM
Pin Description ( Continued )
Pin No
Symbol Type
Description
Push Hold key lager than 2 sec. to enable the back light function. This pin will
39
BKOUT
O change from V- to V+ and lasts for 5 minutes.. Once press Hold key lager than 1
sec. again , this pin will change level back to V-.
40
CESEL
I Voltage OL selection feature control pin. (1010V/610V)
41
DISDGBP
I Control warning buzzer output at HV mode. Pulled to low and buzzer is disabled.
In µA or mA modes, it is used to control the ‘µ’ or ‘m’ sign. Set to V- to enable
42
VST
I
clamp current mode.
43
SLEEP
O Sleep mode indicator, asserts low in SLEEP mode.
Current mode OL indication for 2000A (VST = V-) or 20A (VST = Floating)
44
ASEL
I
ranges
45
DIOV
I Pulled to V- to set the 2.8V OL level in diode mode measurement
46
BUZIN
I Pulled to V- to enable the buzzer output (BUZOUT) always.
47-50
BP4-1
O LCD backplane 4 - LCD backplane1
51
NC
- Not connected
Square wave output at the backplane frequency, synchronized to BP1. ANNUNC
52
ANNUNC
O 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.
53-67 SEG15 - SEG01 O LCD segment line 01 – 14.
68
MMX
I Pulse to V- to enable MAX/MIN function.
69
KEY
I Pulse to V- to change mode.
70
HOLD
I Pulse to V- less than 1 second. to enable HOLD function.
71
S40uA
I Pulled to V- to change 400.0uA to 40.00uA display.
72
OSC1
O Connect to 4MHz crystal oscillator
73-77
NC
- Not connected
78
OSC2
I Connect to 4MHz crystal oscillator
79
BUZOUT
O Outputs a 2KHz audio frequency signal for driving piezoelectric buzzer
80
FC6
I Switch 6 for function selection.
81
FC5
I Switch 5 for function selection.
82
FC4
I Switch 4 for function selection.
83
FC3
I Switch 3 for function selection.
84
FC2
I Switch 2 for function selection.
85
FC1
I Switch 1 for function selection.
86
SLACDC
I Select initial DC/AC state.
87
CP
O Positive capacitor connection for on-chip DC-DC converter.
88
CN
O Negative capacitor connection for on-chip DC-DC converter.
V 1.5
4
2015/12/11