Справочник Пользователя для Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256
Модели
DEMO9S12XHY256
D E M O 9 S 1 2 X H Y 2 5 6
J U L Y 1 5 , 2 0 1 0
U S E R G U I D E
13
LIN Enable
The LIN PHY is enabled by default. The LIN PHY may be disabled by connecting the test
point TP3 to GND.
point TP3 to GND.
LIN COM Input
LIN inputs RX and TX are selectable using the COM_EN option header. Refer to Figure 7
above for details on configuring this header.
above for details on configuring this header.
Wake Option
Option header JP9 allows a LIN Master node to wake a Slave node if enabled. A low-to-high
transition wakes the Slave device from sleep mode.
transition wakes the Slave device from sleep mode.
Figure 10: Option Header
● ● ●
1
LIN Network Master can WAKE LIN device
WAKE_EN
● ● ●
1
J9-2 & J10-2 connect to GND
WAKE_EN
LIN_PWR Option
The LIN_PWR (JP6-1/JP6-2) option jumper connects pin 1 of both LIN connectors to the +V
input. In Master mode, this option may be used to power the LIN bus. This option requires
+12V be applied at connector J11. In Slave mode, this option allows slave device to draw
power from the LIN network. For Slave mode configuration, external power should not be
applied at the barrel connector (J11). LIN_PWR is enabled by installing a shunt from JP6-1 to
JP6-2. Refer to Figure 11 below.
input. In Master mode, this option may be used to power the LIN bus. This option requires
+12V be applied at connector J11. In Slave mode, this option allows slave device to draw
power from the LIN network. For Slave mode configuration, external power should not be
applied at the barrel connector (J11). LIN_PWR is enabled by installing a shunt from JP6-1 to
JP6-2. Refer to Figure 11 below.
CAUTION:
If the target board draws power from the LIN bus in Slave mode, do
not apply external power to connector J11. Damage to the board may
result.