Datasheet

MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504B − JULY 2006 − REVISED JULY 2007
56
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
JTAG and Spy-Bi-Wire Interface
PARAMETER
TEST
CONDITIONS
VCC MIN TYP MAX UNIT
f
SBW
Spy-Bi-Wire input frequency 2.2 V / 3 V 0 20 MHz
t
SBW,Low
Spy-Bi-Wire low clock pulse length 2.2 V / 3 V 0.025 15 μs
t
SBW,En
Spy-Bi-Wire enable time
(TEST high to acceptance of first clock edge,
see Note 1)
2.2 V/ 3 V 1 μs
t
SBW,Ret
Spy-Bi-Wire return to normal operation time 2.2 V/ 3 V 15 100 μs
f
TCK input frequency (see Note 2)
2.2 V 0 5
MHz
f
TCK
TCK input frequency (see Note 2)
3 V 0 10
MHz
R
Internal
Internal pull-down resistance on TEST 2.2 V/ 3 V 25 60 90 kΩ
NOTES: 1. Tools accessing the Spy-Bi-Wire interface need to wait for the maximum t
SBW,En
time after pulling the TEST/SBWCLK pin high
before applying the first SBWCLK clock edge.
2. f
TCK
may be restricted to meet the timing requirements of the module selected.
JTAG Fuse (see Note 1)
PARAMETER
TEST
CONDITIONS
VCC 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 TEST for fuse blow 6 7 V
I
FB
Supply current into TEST during fuse blow 100 mA
t
FB
Time to blow fuse 1 ms
NOTES: 1. Once the fuse is blown, no further access to the JTAG/Test and emulation feature is possible, and it is switched to bypass mode.