User's Manual l MBa7x UM 0101 l © 2020, TQ-Systems GmbH
Page 59
4.3.7
JTAG
TQMa7x
JTAG_TDO
JTAG_TDI
JTAG_TMS
JTAG_TCK
JTAG_TRST#
RESET_IN#
JTAG_VREF
VCC3V3
I
max
= 10 mA
10
k
Ω
10
k
Ω
10
k
Ω
100
Ω
JTAG_MOD
1
k
Ω
(NP
)
3-state
Buffer
10
k
Ω
VCC3V3
20-pin
Header
(X22)
Figure 50: Block diagram JTAG
The JTAG interface is routed to a 20-pin header (X22). The pull-ups for the lines TDI, TMS, TRST# and SRST# are assembled on the
MBa7x. All signal lines use 3.3 V as a reference. The JTAG interface has no ESD protection.
The JTAG mode can be configured by an assembly option. Information on this can be found in the current circuit diagram.
Figure 51: Position of JTAG – X22
Table 69:
Type of JTAG connector
Manufacturer / Number
Description
Fischer Elektronik / SL-11-SMD-052-20-G-BTR
Header, 100 mil pitch, 2 × 10 pins