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ST7265X Datasheet(PDF) 31 Page - STMicroelectronics

Part # ST7265X
Description  LOW-POWER, FULL-SPEED USB 8-BIT MCU WITH 32K FLASH, 5K RAM, FLASH CARD I/F, TIMER, PWM, ADC, I2C, SPI
PDF  166 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST7265X Datasheet(HTML) 31 Page - STMicroelectronics

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RESET SEQUENCE MANAGER (Cont’d)
In stand-alone mode, the 512 CPU clock cycle de-
lay allows the oscillator to stabilize and ensures
that recovery has taken place from the Reset
state.
In USB mode the delay is 256 clock cycles count-
ed from when the PLL LOCK signal goes high.
The RESET vector fetch phase duration is 2 clock
cycles.
Figure 20. Reset Delay in Stand-alone Mode
Figure 21. Reset Delay in USB Mode
Note: For a description of Stand-alone mode and USB mode refer to Section 6.4.
512 x tCPU(STAND-ALONE)
RESET
FETCH VECTOR
DELAY
FETCH VECTOR
256 x tCPU(STAND-ALONE)
256 x tCPU(USB)
PLL Startup
RESET
time (undefined)
DELAY
400 µs typ.
1



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