Preliminary User's Manual l MBLS1012AL UM 0001 l © 2019, TQ-Systems GmbH
Page 9
4.2
Communication interfaces
4.2.1
DAPLink / OpenSDA
A circuit for a DAPLink/OpenSDA programmer is prepared on the MBLS1012AL. Currently this circuit is not supported.
4.2.2
Debug UART
TQMLS1012AL
UART1_SOUT
UART1_SIN
33
Ω
1.8 V to 3.3 V
OpenSDA K20
Header for
FTDI TTL-
232R-3V3
FTDI
UART-2-USB
Mini USB
Mini USB
MUX
3.3 V to 1.8 V
33
Ω
10 pF
10 pF
Illustration 5:
Block diagram Debug UART1
A debug interface is available via UART1. This UART is provided as a virtual COM port via USB. Parallel to this, the UART can also
be accessed at a 6-pin pin header.
UART1 is optionally available on the DAPLink / OpenSDA interface
(see 4.2.1).
The input signal for the TQMLS1012AL can be switched between OpenSDA and USB/pin header with a DIP switch. The output
level is adapted to 3.3 V using a level converter.
Table 7:
DIP switch setting for UART source
DIP switch
OFF
ON
S1, Slot 3
Debug-UART on OpenSDA
Debug-UART on USB / header
4.2.3
eMMC
An eMMC can be used instead of the SD card. The use of an eMMC is currently not supported.
Illustration 6:
Position of eMMC
2:
The DAPLink / OpenSDA interface is currently not supported.