Trion T20 BGA256 Development Kit User Guide
Pin Number
T20F256C
Pin Name
DDIO Mode
Supported
Pin Number
T20F256C
Pin Name
DDIO Mode
Supported
29
GPIOL_29
Yes
30
GPIOL_25
Yes
31
GPIOL_28
Yes
32
GPIOL_26
Yes
33
Yes
34
GND
–
35
GND
–
36
GND
–
Header H6
Header H6 is the JTAG interface. You can access the T20F256C JTAG pins through this
header.
Pin Number
Signal Name
Description
1
3V3
3.3 V power supply
2
TDO
JTAG data output signal
3
TDI
JTAG data input signal
4
TCK
JTAG clock signal
5
FT_RST
Reset pin for on board FTDI FT2232 module
(active low)
6
TMS
JTAG TMS mode select signal
7
GND
Ground
8
GND
Ground
Headers H7 and H8
H7 and H8 are 6-pin headers. You use a shunt across 2 pins to select 3.3 V, 2.5 V, or 1.8 V
for the T20F256C bank VCCIO1B_1C and VCCIO1D_1E, respectively, from the on-board
regulators.
By default, the board ships with a shunt connecting pins 5 and 6 to supply 3.3 V.
Table 8: Voltage Selection for VCCIO1B_1C and VCCIO1D_1E
Shunt
VCCIO1B_1C (H7)
VCCIO1D_1E (H8)
Connect pins 1 and 2
1.8 V
1.8 V
Connect pins 3 and 4
2.5 V
2.5 V
Connect pins 5 and 6
3.3 V (default)
3.3 V (default)
Caution:
Only select one voltage at a time. Installing more than one shunt on H7 or H8 may cause contention.
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