ST92T141K4D0 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

ST92T141K4D0

8/16-BIT MCU FOR 3-PHASE AC MOTOR CONTROL

STMicroelectronics 

ST92141 - RESET AND CLOCK CONTROL UNIT (RCCU)

5.5 OSCILLATOR CHARACTERISTICS

The on-chip oscillator circuit uses an inverting gate

circuit with tri-state output.

Notes: Owing to the Q factor required, Ceramic

Resonators may not provide a reliable oscillator

source.

OSCOUT must not be directly used to drive exter-

nal circuits.

When the oscillator is stopped, OSCOUT goes

high impedance.

The parallel resistor, R, is disconnected and the

oscillator is disabled, forcing the internal clock,

CLOCK1, to a high level, and OSCOUT to a high

impedance state.

To exit the HALT condition and restart the oscilla-

tor, an external RESET pulse is required.

It should be noted that, if the Watchdog function is

enabled, a HALT instruction will not disable the os-

cillator. This to avoid stopping the Watchdog if a

HALT code is executed in error. When this occurs,

the CPU will be reset when the Watchdog times

out or when an external reset is applied.

Table 17. Crystal Specification (5V)

Rs max

(ohm)

Freq.=

3 MHz

Freq.=

4 MHz

Freq.=

5 MHz

CL1=CL2= CL1=CL2= CL1=CL2=

56pF

47pF

22pF

270

350

850

150

200

510

110

120

340

Legend:

CL1, CL2: Maximum Total Capacitances on pins OSCIN

and OSCOUT (the value includes the external capaci-

tance tied to the pin CL1 and CL2 plus the parasitic capac-

itance of the board and of the device).

Note: The tables are relative to the fundamental quartz

crystal only (not ceramic resonator).

Figure 35. Internal Oscillator Schematic

HALT

Figure 34. Crystal Oscillator

CRYSTAL CLOCK

ST9

OSCIN

OSCOUT

CL1

CL2

1M*

*Recommended for oscillator stability VR02116A

R

RIN

ROUT

OSCIN

OSCOUT

VR02086A

Figure 36. External Clock

EXTERNAL CLOCK

ST9

OSCIN

OSCOUT

NC

CLOCK

INPUT

VR02116B

73/179

1

Share Link: