STM6502, STM6503, STM6504, STM6505

Description

Doc ID 16101 Rev 5

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Table 2.

Signal names

Symbol

Input/

output

Description

RST

Output

Open-drain reset output, active-low.

BLD

Output

Battery low detect output, active-low, open-drain. STM6505 only.

SR0

Input

Primary push-button Smart Reset input. Active-low, with or without internal

65 k

SR1

Input

Secondary push-button Smart Reset input - combines with the primary push-

button reset to provide setup delay time before reset. Active-low, with or without

internal 65 k

SRE

Input

Secondary push-button Smart Reset input - provides instant Smart Reset. SRE

STM6504 only.

SRC

Input

Smart Reset input delay setup control: connect to an external capacitor to adjust

TSR

Input

A three-state Smart Reset input delay setup control. When connected to

left open. If left open, for improved system glitch immunity it is strongly

recommended to connect a 0.1 µF decoupling ceramic capacitor between the

Supply

Supply voltage input. Power supply for the device and an input for the monitored

supply voltage. A 0.1 µF decoupling ceramic capacitor is recommended to be

Input

Battery voltage monitoring input. STM6505 only.

Supply

Ground

NC