XC161CS-32F datasheet(19/84 Pages) INFINEON

19 / 84 page

XC161-32

Derivatives

General Device Information

Data Sheet

V1.0, 2004-11

XTAL2

XTAL1

137

138

XTAL2:

Output of the main oscillator amplifier circuit

XTAL1:

Input to the main oscillator amplifier and input to

the internal clock generator

To clock the device from an external source, drive XTAL1,

while leaving XTAL2 unconnected. Minimum and maximum

high/low and rise/fall times specified in the AC

Characteristics must be observed.

XTAL3

XTAL4

140

141

XTAL3:

Input to the auxiliary (32-kHz) oscillator amplifier

XTAL4:

Output of the auxiliary (32-kHz) oscillator

amplifier circuit

To clock the device from an external source, drive XTAL3,

while leaving XTAL4 unconnected. Minimum and maximum

high/low and rise/fall times specified in the AC

Characteristics must be observed.

RSTIN 142

Reset Input with Schmitt-Trigger characteristics. A low-level

at this pin while the oscillator is running resets the XC161.

A spike filter suppresses input pulses < 10 ns. Input pulses

> 100 ns safely pass the filter. The minimum duration for a

safe recognition should be 100 ns + 2 CPU clock cycles.

Note: The reset duration must be sufficient to let the

hardware configuration signals settle.

External circuitry must guarantee low-level at the

RSTIN pin at least until both power supply voltages

have reached the operating range.

BRK

OUT

143

Debug System: Break Out

BRKIN 144

Debug System: Break In

1, 2,

107 -

110

–

No connection.

It is recommended not to connect these pins to the PCB.

AREF

–

Reference voltage for the A/D converter.

AGND

–

Reference ground for the A/D converter.

DDI

48, 78,

135

–

Digital Core Supply Voltage (On-Chip Modules):

+2.5 V during normal operation and idle mode.

Please refer to the Operating Conditions.

Table 2

Pin Definitions and Functions (cont’d)

Sym-

bol

Num.

Input

Outp.

Function

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