NXP Semiconductors freescale MPC5668E, Руководство пользователя, Страница: 23 / 54

MPC5668EVB Users Manual Rev 0.1 May 2009
MPC5668EVBUM/D Page 19 of 29
Table 3-19 Flexray Control Jumpers (J26, J28)
Jumper Position PCB
Legend
Description
J26 (Flex-A)
Posn 1-2
FITTED (D)
BGE
Flexray-A interface BGE signal is pulled to VIO
REMOVED Flexray-A interface BGE signal is unterminated
J26 (Flex-A)
Posn 3-4
FITTED (D)
EN
Flexray-A interface EN signal is pulled to VIO
REMOVED Flexray-A interface EN signal is unterminated
J26 (Flex-A)
Posn 5-6
FITTED (D)
STBEN
Flexray-A interface STBN signal is pulled to VIO
REMOVED Flexray-A interface STBN signal is unterminated
J26 (Flex-A)
Posn 7-8
FITTED (D)
WAKE
Flexray-A interface WAKE signal is pulled to GND
REMOVED Flexray-A interface WAKE signal is unterminated
J28 (Flex-B)
Posn 1-2
FITTED (D)
BGE
Flexray-B interface BGE signal is pulled to VIO
REMOVED Flexray-B interface BGE signal is unterminated
J28 (Flex-B)
Posn 3-4
FITTED (D)
EN
Flexray-B interface EN signal is pulled to VIO
REMOVED Flexray-B interface EN signal is unterminated
J28 (Flex-B)
Posn 5-6
FITTED (D)
STBEN
Flexray-B interface STBN signal is pulled to VIO
REMOVED Flexray-B interface STBN signal is unterminated
J28 (Flex-B)
Posn 7-8
FITTED (D)
WAKE
Flexray-B interface WAKE signal is pulled to GND
REMOVED Flexray-B interface WAKE signal is unterminated
Notes:
- The flexray physical interfaces are connected to 2 pin molex connectors (FlexRAY A) 1.25mm
shrouded 2-pin connectors to connect to the flexray bus (as are standard fit on many Freescale
development platforms using flexray).
Important:
A 40Mhz oscillator is required for the correct operation of the flexray controller. Please
ensure that the 40Mhz crystal is selected as the system clock or use a 40Mhz external
clock source.