Datasheet

MSP430FW429, MSP430FW428
MSP430FW427, MSP430FW425, MSP430FW423
www.ti.com SLAS383E –OCTOBER 2003–REVISED DECEMBER 2013
JTAG Interface
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
2.2 V 0 5 MHz
f
TCK
TCK input frequency
(1)
3V 0 10 MHz
Internal pullup resistance on TMS, TCK,
R
Internal
(2)
2.2 V, 3 V 25 60 90 kΩ
TDI/TCLK
(1) f
TCK
may be restricted to meet the timing requirements of the module selected.
(2) TMS, TDI/TCLK, and TCK pullup resistors are implemented in all versions.
JTAG Fuse
(1)
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
V
CC(FB)
Supply voltage during fuse-blow condition T
A
= 25°C 2.5 V
V
FB
Voltage level on TDI/TCLK for fuse-blow: 6 7 V
I
FB
Supply current into TDI/TCLK during fuse blow 100 mA
t
FB
Time to blow fuse 1 ms
(1) After the fuse is blown, no further access to the MSP430 JTAG/Test and emulation features is possible. The JTAG block is switched to
bypass mode.
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