phyCORE-P8xC51Mx2
60
PHYTEC MMesstechnikGmbH 2005 L-602e_3
14.3.7
RS-485 Interface at Plug P2B
Plug P2B is the upper plug of the double DB-9 connector at P2. P2B
is connected to the RS-485 interface signals of the
phyCORE-P8xC51Mx2 via jumpers. The RS-485 interface is an
alternative function of the serial interface signals on the P8xC51Mx2
controller. The default configuration of the phyCORE-P8xC51Mx2
activates the RS-232 interface. In order to enable the RS-485 signals,
different jumper settings on the phyCORE-P8xC51Mx2 are required
(refer to sections 3.7, 3.8 and 3.9 for details).
Jumper
Setting
Description
JP33
1 + 2
Pin 2 of DB-9 plug P2B connected with
RS-485 A signal on the phyCORE-P8xC51Mx2
JP34
open
Pin 7 of DB-9 plug P2B disconnected from
signals on the Development Board
JP14
open
CAN optocoupler U6 on the Development Board
disconnected from module pins
JP15
open
CAN optocoupler U7 on the Development Board
disconnected from module pins
JP13
open
CAN transceiver and optocoupler on the Development
Board disconnected from supply voltage
JP18
closed
Pin 3 and 6 of DB-9 plug P2B connected with local
GND potential on the Development Board
JP29
open
Supply voltage via pin 9 of DB-9 plugs
P2A or P2B disabled
JP30
closed
Pin 8 of DB-9 plug P2B connected with
RS-485 B signal on the phyCORE-P8xC51Mx2
Table 32:
Jumper Configuration for DB-9 Plug P2B as RS-485 Interface
Pin 8:
A Signal RS-485
Pin 3:
GND (Development Board Ground)
Pin 2:
B Signal RS-485
Pin 6:
GND (Development Board Ground)
Figure 22:
Pin Assignment of the DB-9 Plug P2B as RS-485 Interface
1
2
3
4
7
6
5
8
9
Содержание phyCORE-P8xC51Mx2
Страница 1: ...A product of a PHYTEC Technology Holding company phyCORE P8xC51Mx2 Hardware Manual Edition April 2005...
Страница 22: ...phyCORE P8xC51Mx2 14 PHYTEC MMesstechnikGmbH 2005 L 602e_3 Figure 7 Location of the Jumpers Bottom View...
Страница 46: ...phyCORE P8xC51Mx2 38 PHYTEC MMesstechnikGmbH 2005 L 602e_3...
Страница 50: ...phyCORE P8xC51Mx2 42 PHYTEC MMesstechnikGmbH 2005 L 602e_3...
Страница 82: ...Published by PHYTEC Messtechnik GmbH 2005 Ordering No L 602e_3 Printed in Germany...