STM6825 STMicroelectronics, STM6825 Datasheet - Page 10

• Manufacturer Part Number: STM6825
• Description: Reset + Manual Reset
• Manufacturer: STMicroelectronics

Operation
2
2.1
2.2
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Operation
Reset output
The STM6xxx supervisor asserts a reset signal to the MCU whenever V
reset threshold (V
(MR) is taken low. Reset is guaranteed valid for V
to 85 °C.
During power-up, once V
the reset timeout period, t
Each time RST is asserted, it stays low for at least the reset timeout period (t
V
V
Open drain RST output
The STM6321/6322/6822 have an active-low, open drain reset output. This output structure
will sink current when RST is asserted. Connect a pull-up resistor from RST to any supply
voltage up to 6 V (see
low, and small enough to register a logic high while supplying all input current and leakage
paths connected to the reset output line. A 10 kΩ pull-up resistor is sufficient in most
applications.
Figure 11. STM6321/6322/6822 open drain RST output with multiple supplies
1. STM6322/6822.
2. STM6321/6822.
3. STM6321/6322.
CC
CC
goes below the reset threshold the internal timer clears. The reset timer starts when
returns above the reset threshold.
RST
), a watchdog timeout occurs, or when the push-button reset input
Figure
CC
rec
exceeds the reset threshold an internal timer keeps reset low for
. After this interval reset is de-asserted.
11). Select a resistor value large enough to register a logic
Doc ID 11110 Rev 11
STM6321/6322STM6821/6822/6823/6824/6825
CC
< V
RST
down to V
CC
CC
=1 V for T
goes below the
rec
). Any time
A
= 0 °C