User Manual

P A G E 27
mikromedia 7 CAPACITIVE U S E R M A N U A L
5.6 1x26 pin headers
Most of the host MCU pins are routed to two 1x26 pin headers (2), making
them available for further connectivity. In addition to MCU pins, some
additional peripheral pins are also routed to this header. Besides the ability
to connect various external devices and peripherals by using wire jumpers,
these pins also allow using shields with additional mikroBUS
™
sockets, or
some other peripherals.
PWM Interrupt I
2
C UART Analog lines SPI
5V
GND
AN5
AN2
CS2
CS3
AN4
CS4
CS5
AN1
AN3
SCK5
MISO5
MOSI5
GND
CAN-RX
CAN-TX
CS1
SCK1
MISO1
MOSI1
RST1
RST2
RST3
RST4
3.3V
Ground
3.3V pwr.
SPI
SPI
GPIO
Analog
GPIO
CAN
Ground
5V pwr.
52.
51.
46.
49.
45.
44.
47.
43.
42.
50.
48.
41.
40.
39.
27.
38.
37.
36.
35.
34.
33.
32.
31.
30.
29.
28.
26. RST
25. 3.3V
20. PWM1
23. R
19. PWM2
18. PWM3
21. R
17. PWM4
16. PWM5
24. L
22. L
15. INT1
14. INT2
13. INT3
1. VDC
12. INT4
11. INT5
10. SCL1
9. SDA1
8. RX1
7. TX1
6. RX5
5. TX5
4. SCL5
3. SDA5
2. GND
Ground
VCC-EXT
I2C2
I2C1
UART
INTERRUPT
PWM
Audio IN
3.3V pwr.
Reset
Audio OUT
Figure 15: 1x26 pin header view
N O T E CAN transceiver can not be used at the same time on the MCU card
and on the 1x26 pin headers.
CONNECTIVITY
5.5 CAN
Although not included on the mikromedia 7 development board, CAN bus
connectivity can be added as a bonus feature, if the MCU on the installed
MCU Card supports it. Similarly to Ethernet, components related to the CAN
communication (i.e. CAN transceiver IC) are already included on such MCU
Card, along with a small 2-pole screw connector. This allows mikromedia
7 to be used for the CAN communication without any additional hardware
modifications required.
Besides the CAN circuit on the MCU Card itself, CAN communication
lines are routed to the 1x26 pin header, allowing them to be used with
an external CAN transceiver. There are two SMD jumpers near this header
(JP38 and JP39) (3), which allow restricting these lines to the MCU Card
only. If these SMD jumpers are populated, CAN RX and CAN TX lines of the
host MCU will also become available over the 1x26 pin header. The jumpers
are populated by default.
Once the external CAN transceiver is connected to CAN-RX and CAN-TX
on the 1x26 pin header, CAN jumpers on MCU Card have to be removed
(for details check the schematic of the used MCU Card). Similarly, if the
CAN transceiver on the MCU Card is to be used, JP38 and JP39 on the
mikromedia 7 have to be removed if external CAN transceiver is connected
to CAN-RX and CAN-TX pins on the 1x26 pin header. If there is no external
CAN transceiver connected to pin header then CAN transceiver on the MCU
Card can be used without removing JP38 and JP39.