DS80CH11 Datasheet, PDF (13/88 Pages) Dallas Semiconductor – System Energy Manager

DS80CH11
PIN SYMBOL
DESCRIPTION
18
VCC
Digital Power Supply Input: For microcontroller and associated functions.
85
120
101
VPFW
Power Fail Warning: Output, active low. The VPFW pin signals an impending power
failure when VCC drops below VPFW voltage threshold.
44
VRH
A/D Positive Voltage Reference: The VRH pin is the positive reference (upper voltage
limit) of the A/D Converter.
45
VRL
A/D Negative Voltage Reference: The VRL pin is the negative reference (lower volt-
age limit) of the A/D Converter.
102
VRST
Power Fail Reset: Output, active low. The VRST pin signals a “power not good” condi-
tion to the system when system VCC has dropped below the VRST voltage threshold.
118
XTAL1
µC Crystal Oscillator Inputs. XTAL1 and XTAL2 provide support for parallel resonant,
119
XTAL2
AT cut crystals. XTAL1 acts also as an input if there is an external clock source in place
of a crystal. XTAL2 serves as the output of the crystal amplifier.
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