JTAG Programming
UG0451 User Guide Revision 7.0 16
Figure 4 • Programming Microsemi Devices in a JTAG Chain
3.2 Programming Using an External Programmer
SmartFusion2/IGLOO2 devices can be programmed using an external programmer through the
dedicated JTAG port. When programming with the Libero SoC or standalone FlashPro software, a
FlashPro4/FlashPro5 cable must be connected to the JTAG pins of the device through a 10-pin
programming header, as shown in the following figures. The target board must provide power to the VPP,
VPPNVM, VDD, and VDDIOx (where x = JTAG bank number) pins.
Figure 5 • JTAG Programming using External Programmer
3.2.1 Power Supply Requirements for Programming
During SmartFusion2 or IGLOO2 programming, The required power supplies for JTAG must be within the
prescribed specification and JTAG signals must be toggling within that specification, see Figure 2,
page 14. Required signal integrity measures must be taken to ensure that the power supplies and JTAG
signals are free from noise. For information about the tolerance levels, see the SmartFusion2 SoC FPGA
Datasheet.
• Each power supply required for programming
• Normal device operation as well as the specification for the JTAG signals
SmartFusion2 and IGLOO2 FPGAs require a single programming voltage to be applied at the VPP pin
during programming. This voltage must be supplied from the board. Under normal operating conditions,
VPP and VPPNVM must be connected to their respective supply range. For the VPP and VPPNVM
FlashPro4/5
JTAG Header
TDI
TDO
Device #6
Device #5
Device #4
Device #3
Device #2
Device #1
Non-Microsemi
SoC Device
IR = 4
Non-Microsemi
SoC Device
IR = 6
Non-Microsemi
SoC Device
IR = 4
SmartFusion2/
IGLOO2
Device
IR = 8
Non-Microsemi
SoC Device
IR = 4
ProASIC3
Device
IR = 4
SmartFusion2/IGLOO2
JTAG
System Controller
Fabric (Blank)
eNVM
(Blank)
AES256
System Board
FlashPro4/5
USB
Programming Header (dedicated JTAG)
Mfr.: P/N: HTST-105-01-L-DV-A
Mfr.: Samtec Inc
10-pin
Ribbon Cable
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