ST72F321AR9TC View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72F321AR9TC

8-BIT MCU WITH NESTED INTERRUPTS, FLASH, 10-BIT ADC, FIVE TIMERS, SPI, SCI, I2C INTERFACE

STMicroelectronics 

ST72321

CLOCK AND TIMING CHARACTERISTICS (Cont’d)

Oscil.

LP

MP

MS

HS

Typical Ceramic Resonators (information for guidance only)

Reference3)

Freq.

Characteristic 1)

CL1 CL2 tSU(osc)

[pF] [pF] [ms] 2)

CSA2.00MG

2MHz ∆fOSC=[±0.5%tolerance,±0.3%∆Ta,±0.3%aging,±x.x%correl] 22 22 4

CSA4.00MG

4MHz ∆fOSC=[±0.5%tolerance,±0.3%∆Ta,±0.3%aging,±x.x%correl] 22 22 2

CSA8.00MTZ

8MHz ∆fOSC=[±0.5%tolerance,±0.5%∆Ta,±0.3%aging,±x.x%correl] 33 33 1

CSA16.00MXZ0404) 16MHz ∆fOSC=[±0.5%tolerance,±0.3%∆Ta,±0.3%aging,±x.x%correl] 33 33 0.7

Notes:

1. Resonator characteristics given by the ceramic resonator manufacturer.

2. tSU(OSC) is the typical oscillator start-up time measured between VDD=2.8V and the fetch of the first instruction (with a

quick VDD ramp-up from 0 to 5V (<50µs).

3. Resonators all have different characteristics. Contact the manufacturer to obtain the appropriate values of external

components and to verify oscillator performance.

4. 3rd overtone resonators require specific validation by the resonator manufacturer.

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