SAKC505L 查看數據表（PDF） - Infineon Technologies

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SAKC505L

8-Bit CMOS Microcontroller

Infineon Technologies 

C505L

Table 1

Pin Definitions and Functions (cont’d)

Symbol

Pin Number I/O*) Function

XTAL2

47

O XTAL2

Output of the inverting oscillator amplifier.

XTAL1

48

I

XTAL1

Input to the inverting oscillator amplifier and input to the

internal clock generator circuits.

To drive the device from an external clock source, XTAL1

should be driven, while XTAL2 is left unconnected. To

operate above a frequency of 16 MHz, a duty cycle of 50%

should be maintained.

Minimum and maximum high and low times as well as rise/

fall times specified in the AC characteristics (refer to data

Sheet) must be observed.

XTAL4

51

O XTAL4

Output of the inverting real-time clock oscillator amplifier.

XTAL3

52

I

XTAL3

Input to the inverting real-time clock oscillator amplifier.

To drive the real-time clock from an external clock source,

XTAL3 should be driven, while XTAL4 is left unconnected.

Minimum and maximum high and low times as well as rise/

fall times specified in the AC characteristics (refer to Data

sheet) must be observed.

*) I = Input

O = Output

Data Sheet

9

06.99

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