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ST7261 Datasheet(PDF) 15 Page - STMicroelectronics

Part # ST7261
Description  LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS, ROM MEMORY, LVD, WDG, TIMER
PDF  80 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7261 Datasheet(HTML) 15 Page - STMicroelectronics

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Figure 14. Reset Timing Diagram
Note: Refer to Electrical Characteristics for values of tDDR, tOXOV, VIT+ and VIT-.
Figure 15. Reset Block Diagram
Note: The output of the external reset circuit must have an open-drain output to drive the ST7 reset pad.
Otherwise the device can be damaged when the ST7 generates an internal reset (LVD or watchdog).
VDD
OSCIN
fCPU
FFFF
FFFE
PC
RESET
tDDR
tOXOV
514 CPU
CLOCK
CYCLES
DELAY
RESET
RON
VDD
WATCHDOG RESET
LVD RESET
INTERNAL
RESET
PULSE
GENERATOR
200ns
Filter
tw(RSTL)out + 128 fOSC
delay



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