peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 364

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

7.4
Table 7-4
Parameter
Clock input capacitance
Clock output capacitance
Input capacitance
Output capacitance
7.5
The strap input pins are sampled during reset, and determine some modes of the DOC.
The strap inputs are: CDB0/BOOT, CDB1/DBG, CDB2/ROM, CDB4/URST and CDB12/
SEIBDIS.
When a strap input pin is not driven externally during reset, it is driven internally by an
internal pull-down. If a fixed external pull-up is applied on a strap, a pull-up resistor of
5 kΩ is required. The required precision of the resistor is 10%.
7.6
.
Table 7-5
Parameter
Clock input capacitance
Clock output capacitance
Motional capacitance
Shunt
Load
Resonance resistor
C
Note: Other external crystals may be used (up to 40 MHz). However, the external
Semiconductor Group
LD
= 2 ×
circuitry must be changed accordingly.
C
Capacitances
Strap Pins Pull-up Resistors Specification
40 MHz External Crystal
L
-
C
CLK40-X(1 or 0)
Symbol
C
C
C
C
C
R
Symbol
C
C
C
C
1
LK40-XI
LK40-XO
1
O
L
XIN
XOUT
IN
OUT
min.
min.
20
5
20
50
Limit Values
7-3
Limit Values
max.
max.
7
7
Electrical Characteristics
Unit Notes
pF
pF
pF
pF
Unit Notes
pF
pF
fF
pF
pF
Ω
f
The pins, which are
not under test, are
connected to GND
C
= 1 MHz
PEB 20560
2003-08