76
COMX-P2020 Module Installation and Use (6806800K97F)
Functional Description
Functional Description
4.11
UART
The COMX-P2020 Module consists of two universal asynchronous receiver/transmitters
(UARTs). The UARTs act independently. Each UART is clocked by the platform clock
(600MHz). The DUART programming model is compatible with the PC16552D.
GPIO 2
Input
connected to the COM Express carrier board
GPIO 3
Input
connected to the COM Express carrier board
GPIO 4
Output
0
connected to the COM Express carrier board
GPIO 5
Output
0
connected to the COM Express carrier board
GPIO 6
Output
0
connected to the COM Express carrier board
GPIO 7
Output
0
connected to the COM Express carrier board
GPIO 8
Multiplex as SDHC_CD: which is used to check if
the SD insert or not.
GPIO 9
Multiplex as SDHC_WP: which is used to check
the SD is write protect or not.
GPIO 10
Output
0
can be used to clear WDT timer.
If the pin is set to 1, the WDT timer will be cleared.
GPIO 11
Input
connected to the COM Express carrier board
GPIO 12
Output
1
If this pin is set to 1, and s3[14] is set to OFF, then
Serdes#2 is switch to COMe PCI #2;
If this pin is set to 0, or s3[14] is set to ON, then
Serdes#2 is switch to GEPHY2.
For COMX-P2020, GPIO[12] must be set to 1 and
s3[14] must be set to OFF.
GPIO 13
Input
connected to the COM Express carrier board
GPIO 14
Input
connected to the COM Express carrier board
GPIO 15
Input
connected to the COM Express carrier board
Table 4-1
GPIO Description (continued)
Name
Intput/ Output Reset Value
Description
Summary of Contents for COMX-P2020 BSP
Page 1: ...COMX P2020 Module Installation and Use P N 6806800K97F November 2019 ...
Page 6: ...6 ProductNameLong Manual Type 680xxxxxxx Table of Contents ...
Page 8: ...List of Tables 8 ProductNameLong Manual Type 680xxxxxxx ...
Page 10: ...List of Figures 10 ProductNameLong Manual Type 680xxxxxxx ...
Page 28: ...28 COMX P2020 Module Installation and Use 6806800K97F Introduction Introduction ...
Page 61: ...Controls LEDs and Connectors COMX P2020 Module Installation and Use 6806800K97F 61 ...
Page 63: ...Controls LEDs and Connectors COMX P2020 Module Installation and Use 6806800K97F 63 ...
Page 65: ...Controls LEDs and Connectors COMX P2020 Module Installation and Use 6806800K97F 65 ...
Page 91: ...1 ...
