ES235 Datasheet, PDF (5/37 Pages) Cyrustek corporation – 4000 Counts DMM / Peak

ES235
4000 Counts DMM / Peak
Pin Description ( Continued )
Pin No
Symbol
Type
Description
99
RS232
I Assert low (V-) to make serial data output function not available.
100
OSC2
O Crystal oscillator output connection.
101
OSC1
I Crystal oscillator input connection.
102
RSOUT
O Serial data output.
103
PEAK
I Pulse to V- to enable the PEAK Hold function.
104
HZ
I Pulse to V- to enable VAHZ mode or duty cycle measurement in Freq. mode.
105
MMX
I Pulse to V- to enable MAX/MIN function.
Pulse to V- to enable/disable Relative function or Zero function. Pulse to V-
106
REL
I larger than one second to enable/disable RS232 output. When RS232 output is
enabled, the APO will be disabled automatically.
107
BKLIT
I Back light function. Pulse low to set BKOUT pin output.
108
KEY
I Pulse to V- to change mode.
Pulse to V- to enable HOLD function. Pulse to V- larger than one second to
109
HOLD
I
enable Delayed Hold function.
110
RANGE
I Pulse to V- to enable manual mode and manual range selection.
111
FC5
I Switch 5 for function selection.
112
FC4
I Switch 4 for function selection.
113
FC3
I Switch 3 for function selection.
114
FC2
I Switch 2 for function selection.
115
FC1
I Switch 1 for function selection.
116
SLACDC
I Select initial DC/AC state.
117
CN
O Negative capacitor connection for on-chip DC-DC converter.
118
CP
O Positive capacitor connection for on-chip DC-DC converter.
119
LBAT9
I
Multi-level low battery configuration input. Simple external resistor divider is
required.
120
V-
P Negative supply voltage.
121
V-
P Negative supply voltage.
122
V+
O Output of on-chip DC-DC converter.
123
V+
O Output of on-chip DC-DC converter.
124
DGND
P / G Digital ground.
125
AGND
P / G Analog ground.
126
AGND
P / G Analog ground.
127
PEAKH
I / O Maximum peak hold output. Connected to a polyester capacitor
128
PEAKL
I / O Minimum peak hold output. Connected to a polyester capacitor
Note: Pin91-Pin96 are 4-level logic definition: (V+/DGND/Floating/V-), see section Operation mode
V 2.2
5
2015/12/15