XC167CI-16F_06 Datasheet, PDF (21/90 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core

XC167CI-16F
Derivatives
General Device Information
Table 2
Pin Definitions and Functions (cont’d)
Sym- Pin Input Function
bol
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
Note: Input pin XTAL1 belongs to the core voltage domain.
Therefore, input voltages must be within the range
defined for V_DDI.
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
Note: Input pin XTAL3 belongs to the core voltage domain.
Therefore, input voltages must be within the range
defined for V_DDI.
Reset Input with Schmitt-Trigger characteristics. A low-level
at this pin while the oscillator is running resets the XC167.
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 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.
Data Sheet
19
V1.3, 2006-08