ES233 datasheet(5/37 Pages) CYRUSTEK

5 / 37 page

V 2.2

2015/12/15

ES233

4000 Counts DMM

Pin Description ( Continued )

Pin No

Symbol

Type

Description

RS232

Assert low (V-) to make serial data output function not available.

100

OSC2

Crystal oscillator output connection.

101

OSC1

Crystal oscillator input connection.

102

RSOUT

Serial data output.

103

Not connected.

104

Pulse to V- to enable VAHZ mode or duty cycle measurement in Freq. mode.

105

MMX

Pulse to V- to enable MAX/MIN function.

106

REL

Pulse to V- to enable/disable Relative function or Zero function. Pulse to V-

larger than one second to enable/disable RS232 output. When RS232 output is

enabled, the APO will be disabled automatically.

107

BKLIT

Back light function. Pulse low to set BKOUT pin output.

108

KEY

Pulse to V- to change mode.

109

HOLD

Pulse to V- to enable HOLD function. Pulse to V- larger than one second to

enable Delayed Hold function.

110

RANGE

Pulse to V- to enable manual mode and manual range selection.

111

FC5

Switch 5 for function selection.

112

FC4

Switch 4 for function selection.

113

FC3

Switch 3 for function selection.

114

FC2

Switch 2 for function selection.

115

FC1

Switch 1 for function selection.

116

SLACDC

Select initial DC/AC state.

117

Negative capacitor connection for on-chip DC-DC converter.

118

Positive capacitor connection for on-chip DC-DC converter.

119

LBAT9

Multi-level low battery configuration input. Simple external resistor divider is

required.

120

V-

Negative supply voltage.

121

V-

Negative supply voltage.

122

V+

Output of on-chip DC-DC converter.

123

V+

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

Not connected.

128

Not connected.

Note: Pin91-Pin96 are 4-level logic definition: (V+/DGND/Floating/V-), see section Operation mode

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