mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 42

• Manufacturer Part Number: mfr4200
• Description: Flexray Communication Controllers
• Manufacturer: Freescale Semiconductor, Inc

Device Overview
2.2.3.18 RESET# — External Reset
RESET# is an active-low control signal that acts as an input to initialize the CC to a known startup state.
2.2.3.19 INT_CC# — Interrupt Output
INT_CC# is an AMI and HCS12 interfaces interrupt request output signal. The CC may request a service
routine from the host to run. The interrupt is indicated by the logic level: it is asserted if the INT_CC#
outputs a logic "0" and negated if it outputs a logic "1".
The pin can be configured to provide either high or reduced output drive.
2.2.3.20 TEST
The TEST pin must be tied to VSS in all applications.
2.2.3.21 EXTAL/CC_CLK — Crystal Driver, External Clock Pin
This pin can act as a crystal driver pin (EXTAL) or as an external clock input pin (CC_CLK). On reset, the
device clock is derived from the input frequency on this pin. Refer to
connections and and
2.2.3.22 XTAL — Crystal Driver Pin
XTAL is a crystal driver pin. Refer to
external clock connections. See also
42
MFR4200
VDDOSC
VSSOSC
EXTAL
XTAL
As the CLKOUT signal can be disabled during internal resets, refer to
Section 2.4.4, “External Output
generation during external hard and internal resets.
Figure 2-4
Rs
VSSOSC
C3
Rb
for external clock connections. See also
Figure 2-3. Pierce Oscillator Connections
Q
Chapter 6, “Oscillator
Figure 2-3
VSSOSC
C1
C2
MFR4200 Data Sheet, Rev. 0
Clock” for more information on CLKOUT
for Pierce oscillator connections and and
Where:
Refer to crystal manufacturer’s product specification for
recommended values
•
•
•
•
•
(OSCV2)”.
Q = 40 MHz crystal
Rb is in the range 1M - 10 Mohms
Rs is a lower value, which can be 0 Ohms
C1 = C2
Oscillator supply output capacitor C3 = 220 nF
Figure 2-3
Chapter 6, “Oscillator
for Pierce oscillator
Freescale Semiconductor
Figure 2-4
(OSCV2)”.
for