ES51988
3 3/4 AUTO REL/MAX/MIN
Pin. No Symbol.
73 NC
74 BUZOUT
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
NC
NC
NC
NC
OSC1
OSC2
NC
KEY
REL
MAX/MIN
HOLD
RANGE
FC5
FC4
FC3
FC2
FC1
LBAT9
Description.
Buzzer output. Audio frequency (2.0KHz) output which drives a
piezoelectric buzzer.
Crystal oscillator (input) connection.
Crystal oscillator (output) connection.
Mode change pin.
Input to get relative display. Pulse low to make this function active.
Input to set MAX/MIN display. Pulse low to make this function active.
Input to hold display. Pulse low to make this function active.
Input to set automatic/manual mode and manual range selection. Pulse
low to make this function active.
Switch 5 for function selection.
Switch 4 for function selection.
Switch 3 for function selection.
Switch 2 for function selection.
Switch 1 for function selection.
Low battery voltage setting. If used 3V battery, connected this pin to
AGND, the default low battery voltage will be –2.3V. If used 9V
battery, when the input voltage is small than VRH(-1.2V), the low
battery annunciator will be display.
Serial data output.
Positive capacitor connection for on-chip DC-DC converter.
Negative capacitor connection for on-chip DC-DC converter.
Negative supply voltage.Connecting to battery negative terminal.
Negative supply voltage.Connecting to battery negative terminal.
Digital ground,connected to battery positive terminal.
Analog ground.
Analog ground.
93
94
95
96
97
98
99
100
SDO
C+
C-
V-
V-
DGND
AGND
AGND
5
92年8月4日
CYRUSTEK [ Cyrustek corporation ]
