Freescale Semiconductor FlexRay MFR4310 - MPC Interface; Figure 2-6. AMI Interface with DSP 56 F83 (Hawk) Family

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Device Overview

MFR4310 Reference Manual, Rev. 2

50 Freescale Semiconductor

2.7.1.2 Asynchronous Memory Interface with DSP 56F83 (Hawk) Family

Figure 2-6. AMI Interface with DSP 56F83 (Hawk) Family

2.7.1.3 Asynchronous Memory Interface Timing

See Section A.4, “Asynchronous Memory Interface Timing” for timing characteristics of the AMI

interface.

2.7.2 MPC Interface

Figure 2-7 shows how to connect the CC to a microcontroller using the MPC interface. In this case, the

host bus pins have the meanings shown in Table 2-9.

• Data exchange in MPC mode is controlled by the CE#, BSEL[1:0]#, and OE# inputs.

• The MPC interface is implemented as an asynchronous memory slave module, thus enabling the

fast interfacing with a variety of microcontrollers.

• The MPC interface decodes its internal register addresses with help of the chip select signal CE#

and the address lines A[12:1].

• The MPC interface accepts only aligned 16-bit read and 8- or 16-bit write transactions. The MPC

interface does not support 8-bit read accesses.

MFR4310DSP56F83xx Family

D15 D15

A11 A12

…

WE#

CE#

OE#

WR#

CSn#

RD#

INT_CC#

TXD_BG2/IF_SEL0

TXD_BG1/IF_SEL1

IRQn#

VDDXn

PL Interface

VSSXn

BSEL1#

BSEL0#