ST72334J4B7(2003) View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST72334J4B7
(Rev.:2003)

8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, SCI INTERFACES

STMicroelectronics 

ST72334J/N, ST72314J/N, ST72124J

CLOCK AND TIMING CHARACTERISTICS (Cont’d)

16.5.3.2 Typical Ceramic Resonators

Symbol

tSU(osc)

Parameter

Conditions

Typ

Unit

LP

2MHz

4.2

MP

4MHz

2.1

Ceramic resonator start-up time

ms

MS

8MHz

1.1

HS

16MHz

0.7

Note:

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).

Figure 69. Application with Ceramic Resonator

WHEN RESONATOR WITH

INTEGRATED CAPACITORS

i2

CL1

OSC1

fOSC

RESONATOR

RF(EXT)

RF

CL2

OSC2

RD

ST72XXX

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. The oscillator selection can be optimized in terms of supply current using an high quality resonator with small RS value.

Refer to Table 22 and Table 23 and to the ceramic resonator manufacturer’s documentation for more details.

118/153

Share Link: