BT8375 Datasheet, PDF (297/323 Pages) Conexant Systems, Inc – single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
5.0 Electrical/Mechanical Specifications
5.7 JTAG Interface Timing
5.7 JTAG Interface Timing
Table 5-17. Test and Diagnostic Interface Timing Requirements
Symbol
Parameter
1
TCK pulse width high
2
TCK pulse width low
3
TMS, TDI setup to TCK rising edge
4
TMS, TDI hold after TCK high
Minimum
80
80
20
20
Maximum
—
—
—
—
Units
ns
ns
ns
ns
Table 5-18. Test and Diagnostic Interface Switching Characteristics
Symbol
Parameter
5
TDO hold after TCK falling edge
6
TDO delay after TCK low
7
TDO enable (Low Z) after TCK falling edge
8
TDO disable (High Z) after TCK low
Minimum
0
—
2
—
Maximum
—
50
—
25
Units
ns
ns
ns
ns
Figure 5-20. JTAG Interface Timing
TDO
7
5
8
1
6
TCK
3
4
2
TDI
TMS
N8370DSE
Conexant
5-23