ML410 Embedded Development Platform
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45
UG085 (v1.7.2) December 11, 2008
Detailed Description
R
as a generic FAT file system. The data bus for the System ACE MPU port is shared with the
USB controller. See
“Non-Volatile Storage through the MPU Interface,” page 46
.
Board Bring-Up through the JTAG Interface
The System ACE CF controller is located between the JTAG connector and the FPGA, and
passes the JTAG signals back and forth between the two. During configuration, the
System ACE CF controller has full control of the JTAG signals.
Figure 2-11
shows the
connections between the JTAG connector, System ACE CF controller, and the FPGA. The
CPU JTAG header (J12) is used to access the JTAG interface when J27 is jumpered. See
“JTAG Source Select (J27),” page 79
.
Figure 2-11:
JTAG Connections to the FPGA and System ACE CF Controller
PC4 (J9)
J27
S
y
s
tem ACE (U
38
)
FPGA (U
3
7)
CPU_TCK
CPU_TM
S
CPU_TDI
CPU_TDO
(From J12)
PC4_TCK
JTAG_
S
RC_
S
EL
TCK
TM
S
TDI
TDO
TCK
TM
S
TDI
TDO
PROG
2.5V
INIT
CFG_TCK
CFG_TM
S
CFG_TDI
CFG_TDO
CFG_PROG
CFG_INIT
PC4_TM
S
PC4_TDI
S
Y
S
ACE_TDO
2.5V
0
1
3
.
3
V
2.5V
0
1
0
1
0
1
J14
S
W
3
S
chem
a
tic
S
heet
33
CFG
Mode
CFG
Addr
S
chem
a
tic
S
heet 10
2.5V
2.5V
2.5V
UG0
8
5_11_120
8
05
J27 = Open (def
au
lt,
us
e the J9 PC4 JTAG connector)
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