AMD SC2200 User Manual
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
t1
t3
t5
t2
t4