mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 39

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

MT is active, irrespective of which physical layer is selected. If the RS485 driver type is selected, this pin
is not used.
This signal should be connected to the Bus Guardians on each channel. The pin can be configured to
provide either high or reduced output drive.
CLK_S1 is the CLKOUT clock frequency selection input signal. See
2.2.3.11 ARM/DBG1/CLK_S0 — Bus Guardian ARM, Debug Strobe Point 1, Clock
ARM is an output signal from the CC to a bus guardian. If a bus guardian device is not used in an
application, this pin may be left open.
ARM is active, irrespective of which physical layer is selected. If the RS485 driver type is selected, this
pin is not used.
This signal should be connected to the bus guardian on each channel. The pin can be configured to provide
either high or reduced output drive.
DBG1 is the debug strobe point output 1. The function output on this pin is selected by the debug port
control register. Refer to
CLK_S0 is the CLKOUT clock frequency selection input signal. See
Freescale Semiconductor
Output Select 0
CLK_S[0:1] signals are inputs during the internal reset sequence and are
latched by the internal reset signal level.
While the CLK_S1 value is being latched, the output drive control is
disabled and the internal pulldown resistor is connected to the pin.
As CLK_S[0:1] signals share pins with Physical Layer Interface signals,
pullup/down devices must be used for the selection. Recommended
pullup/down resistor values for the CLK_S[0:1] inputs are given in
Section 2.4.2, “Recommended Pullup/down Resistor
CLK_S[0:1] signals are inputs during the internal reset sequence and are
latched by the internal reset signal level.
While the CLK_S0 value is being latched, the output drive control is
disabled and the internal pulldown resistor is connected to the pin.
As CLK_S[0:1] signals share pins with Physical Layer Interface signals,
pullup/down devices must be used for selection. Recommended
pullup/down resistor values for the CLK_S[0:1] inputs are given in the
Section 2.4.2, “Recommended Pullup/down Resistor
Section 3.10, “Debug
MFR4200 Data Sheet, Rev. 0
Port” for more information.
NOTE
NOTE
Values”.
Values”.
Table
Table
2-2.
2-2.
Signal Descriptions
39