XC161CJ_02 Datasheet, PDF (19/78 Pages) Infineon Technologies AG – 16-Bi t Single-Chip Microcontroller Preliminary

XC161
Derivatives
Preliminary
General Device Information
Table 2
Pin Definitions and Functions (cont’d)
Symbol Pin Input Function
Num. Outp.
XTAL2 137 O
XTAL1 138 I
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 140 I
XTAL4 141 O
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 I
Reset Input with Schmitt-Trigger characteristics. A low level
at this pin while the oscillator is running resets the XC161. An
internal pullup resistor permits power-on reset using only a
capacitor connected to V_SS.
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: To let the reset configuration of PORT0 settle and to
let the PLL lock a reset duration of ca. 1 ms is
recommended.
BRK 143 O
OUT
Debug System: Break Out
BRKIN 144 I
Debug System: Break In
NC
1, 2, -
107 -
110
No connection.
It is recommended not to connect these pins to the PCB.
V_AREF
V_AGND
V_DDI
41
-
42
-
48, 78, -
135
Reference voltage for the A/D converter.
Reference ground for the A/D converter.
Digital Core Supply Voltage (On-Chip Modules):
+2.5 V during normal operation and idle mode.
Please refer to the Operating Conditions
Data Sheet
15
V1.0, 2002-03