QCA4020

9
QCA4020 miniPCIe Copyright © 5GHUB.US
4 How to flash Image to QCA4020 miniPCIe
Flashing the image o the QCA4020 miniPCIe can be done using either of the following two methods:
4.1 Method 1: Through Emergency Download Mode (EDL)
In this step up, user can do the following:
1- Connect J3 (PIN 1 and PIN 2). This is the GPIO22_BE used for EDL.
2- Connect the USB cable between the PC and the USB port of M20.
4.2 Method 2: Through JTAG
In this step up, user can do the following:
1- Connect J1 (PIN 1 and PIN 2). This is the GPIO20_BE which used to force JTAG mode
2- Connect JTAG cable to the JTAG 10-PIN header which includes the signals TCK, TDI, TDO, TMS
Follow normal procedure to flash the *.elf file over the JTAG interface.
QCA4020 JTAG pins used as in the following Table:
Table 2: JTAG Interface.
QCA4020 PIN#
JTAG Signal
GPIO_50
JTAG3_BE_TCK
GPIO_51
JTAG3_BE_TDO
GPIO_52
JTAG3_BE_TMS
GPIO_53
JTAG3_BE_TDI
J2 on the QCA4020 is used to configure JTAG. Connecting J2 (PIN 1 and PIN2), force the following JTAG
configuration:
Table 3: J2 Setting for JTAG Interface.
Boot_Configure_B
E_0GPIO_9_BE
Boot_Configure_B
E_1GPIO_25_BE
Boot_Configure_BE
_2GPIO_18_BE
JTAG Interface
for M4
0
0
1
JTAG in
GPIO[53:50]