User's Manual

Page 11 of 36
May 16, 2019
Data Sheet and User Manual
AES-MS-MT3620-M-G Module
Data Sheet and User Manual
MT3620 Bootstrap Pins
Note! Six of the seven bootstrap pins are already strapped on the module.
The DEBUG_RTS signal must however be strapped on the OEM board with a 2K2 pull-down resistor, to
ensure that RECOVERY mode remains disabled (This signal gets driven high to select RECOVERY via an
FTDI device based interface with the development computer when a Debug-Programmer cable is attached)
Function
Pin Name
Strapping
Recommendation
Normal/Test mode
DEBUG_TXD
Pull-Down
Pull-down resistor is on module
Mode = Normal
Recovery mode
DEBUG_RTS
Pull-Down
Pull-down resistor required on OEM board!
Controlled via PC interface, - if present
RTC mode
RECOVERY_TXD
Pull-Up
Pull-up resistor is on module
RTC oscillator = 32 kHz crystal
26MHz
IO0_RTS
Pull-Up
MT3620 internal pull-up on module
Oscillator frequency = 26 MHz
26MHz
IO0_TXD
Pull-Down
Pull-down resistor is on module
Oscillator frequency = 26 MHz
N9 JTAG
IO1_TXD
Pull-Down
Pull-down resistor is on module
N9 JTAG = OFF
A7 JTAG
RECOVERY_RTS
Pull-Down
Pull-down resistor is on module
A7 JTAG = OFF
See the MT3620 Product Brief at the Mediatek webpage
for more detail on the MT3620AN SoC device…
https://www.mediatek.com/products/azureSphere/mt3620