Interconnection of MSP−PRGS430 to Flash-Based MSP430 Devices
3-7
Hardware
3.7 Interconnection of MSP−PRGS430 to Flash-Based MSP430 Devices
The circuit diagram in Figure 3−5 shows the connections required to program
flash-based MSP430 devices (MSP430Fxxx) with the MSP−PRGS430
programming adapter. Consult the device data sheet for the specific device
location of the power supply and JTAG pins. Ensure that all positive and
negative power supply pins are connected together.
The signal TEST/VPP is only required on lower pin-count devices with
multiplexed JTAG pins. In this case, special attention must be given to the
circuit design around the four JTAG pins (TDO/TDI, TDI, TMS, and TCK), since
they are shared between the applications hardware and the JTAG interface
used by programming adapter.
Figure 3−5. MSP−PRGS430 Used to Program Flash-Based MSP430 Devices
V
CC
10 µF
47 kΩ
JTAG
2
VCC_MSP
1
TDO/TDI
4
3
TDI/VPP
65
TMS
8
TEST/VPP
7
TCK
10
9
GND
12
11
RST
14 13
0.1 µF
MSP430Fxxx
RST/NMI
TDO/TDI
V
CC
/AV
CC
/DV
CC
TDI/VPP
TMS
TCK
TEST/VPP
V
SS
/AV
SS
/DV
SS
Note:
The example schematic shows a system where the target voltage is supplied
by the MSP-PRGS430. For in-system programming with an external supply
voltage, do not connect pin 2 of the JTAG connector. In this case, the
PRGS430 supply voltage setting must be adjusted to the external supply
voltage level. The TEST/VPP connection is only required on lower pin-count
devices with multiplexed JTAG pins.
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