BT8954 CONEXANT [Conexant Systems, Inc], BT8954 Datasheet - Page 91

• Manufacturer Part Number: BT8954
• Description: VOICE PAIR GAIN FRAMER
• Manufacturer: CONEXANT [Conexant Systems, Inc]

Bt8954
Voice Pair Gain Framer
5.1.7 Test and Diagnostic Interface Timing
Table 5-9. Test and Diagnostic Interface Timing Requirements
Table 5-10. Test and Diagnostic Interface Switching Characteristics
Figure 5-9. JTAG Interface Timing
N8954DSC
NOTE(S):
(1)
NOTE(S):
according to the VIH, VIL, VOH, and VOL parameters as listed. This interface is for testing only.
Symbol
Symbol
42
43
44
45
Also applies to functional inputs for SAMPLE/PRELOAD and EXTEST instructions.
46
47
48
49
TDO
TMS
TCK
The Test and Diagnostic Interface of the Bt8954 has not yet been fully characterized; therefore, it it not being tested
TDI
TCK Pulse-Width High
TCK Pulse-Width Low
TMS, TDI Setup Prior to TCK Rising Edge
TMS, TDI Hold after TCK High
TDO Hold after TCK Falling Edge
TDO Delay after TCK Low
TDO Enable (Low Z) after TCK Falling Edge
TDO Disable (High Z) after TCK Low
48
Test and diagnostic interface timing and switching requirements are displayed in
Tables 5-8 and 5-9. JTAG interface timing is illustrated in
M
(1)
44
(1)
(1)
Parameter
Parameter
45
(1)
42
(1)
(1)
Conexant
46
47
43
5.0 Electrical and Mechanical Specifications
Minimum
Minimum
80
80
20
20
—
—
0
2
5.1 Electrical Specifications
Figure
Maximum
Maximum
49
5-9.
—
—
—
—
—
50
—
25
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
5-9