ST7232A datasheet(122/157 Pages) STMICROELECTRONICS

Part #	ST7232A

Description	8-BIT MICROCONTROLLER WITH 8K FLASH/ROM, ADC, 4 TIMERS, SPI, SCI INTERFACE

PDF	157 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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ST7232A

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CLOCK AND TIMING CHARACTERISTICS (Cont’d)

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.

Oscil.

Typical Ceramic Resonators (information for guidance only)

CL1

[pF]

CL2

[pF]

tSU(osc)

[ms] 2)

Reference3)

Freq.

Characteristic 1)

CSA2.00MG

2MHz

∆f

OSC=[±0.5%tolerance,±0.3%

∆Ta,±0.3%aging,±x.x%correl]22

CSA4.00MG

4MHz

∆f

OSC=[±0.5%tolerance,±0.3%

∆Ta,±0.3%aging,±x.x%correl]22

CSA8.00MTZ

8MHz

∆f

OSC=[±0.5%tolerance,±0.5%

∆Ta,±0.3%aging,±x.x%correl]33

CSA16.00MXZ0404)

16MHz

∆f

OSC=[±0.5%tolerance,±0.3%

∆Ta,±0.3%aging,±x.x%correl]33

0.7

ST7232A Datasheet(PDF) 122 Page - STMicroelectronics

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