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438 AMD Geode™ SC2200 Processor Data Book
Electrical Specifications
32580B
9.3.16 JTAG Interface
Figure 9-57. TCK Measurement Points and Timing Diagram
Table 9-46. JTAG Timing Parameters
Symbol Parameter Min Max Unit Comments
TCK frequency 25 MHz
t
1
TCK period 40 ns
t
2
TCK high time 10 ns
t
3
TCK low time 10 ns
t
4
TCK rise time 4 ns
t
5
TCK fall time 4 ns
t
6
TDO valid delay 3 25 ns
t
7
Non-test outputs valid delay 3 25 ns 50 pF load
t
8
TDO float delay 30 ns
t
9
Non-test outputs float delay 36 ns
t
10
TDI, TMS setup time 8 ns
t
11
Non-test inputs setup time 8 ns
t
12
TDI, TMS hold time 7 ns
t
13
Non-test inputs hold time 7 ns
V
IH(Min)
V
IL(Max)
1.5V
T
CK
t
1
t
3
t
5
t
2
t
4