mfr4200 Freescale Semiconductor, Inc, mfr4200 Datasheet - Page 26

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

Device Overview
2.1.2
2.1.3
Only one user mode is available on the MFR4200 — normal operating mode.
In normal operating mode, the selections described below are possible.
2.1.3.1
The external interface is selected by means of the IF_SEL[0:1] pins, as shown in
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The MFR4200 provides two hardware selectable host interfaces:
— HCS12 interface, for direct connection to Freescale’s HCS12 family of microcontrollers.
— Asynchronous memory interface (AMI), for asynchronous connection to microcontrollers.
Internal 40 MHz quartz oscillator.
Internal voltage regulator for the digital logic and the oscillator.
Hardware selectable clock output to drive external host devices: Disabled/4/10/40 MHz.
Maskable interrupt sources available over one interrupt output line.
Glueless electrical physical layer interface compatible with dedicated FlexRay physical layer.
Industry standard RS485 physical layer device can be used with additional glue logic.
Two pins have multiplexed strobe functions.
Implementation Details and Constraints
The HCS12 interface clock signal used to synchronize data transfer can run at a maximum rate
of 8 MHz.
Modes of Operation
Interface Selection
Refer to
more implementation details and constraints.
This section depicts only the MFR4200 device modes, not the FlexRay
protocol operating modes of the MFR4200 FlexRay module. Refer to
Chapter 3, “MFR4200 FlexRay Communication Controller
information on the FlexRay module operating modes.
IF_SEL0
Chapter 3, “MFR4200 FlexRay Communication
0
0
1
1
Pin
IF_SEL1
Table 2-1. Interface Selection
0
1
0
1
MFR4200 Data Sheet, Rev. 0
Reserved
HCS12 synchronous interface
Asynchronous Memory Interface
Reserved
NOTE
NOTE
Interface
Controller” for
for more
Table
Freescale Semiconductor
2-1.