LAN9514_12 Datasheet, PDF (48/52 Pages) SMSC Corporation – USB 2.0 Hub and 10/100 Ethernet Controller

4.5.4
JTAG Timing
This section specifies the JTAG timing of the device.
USB 2.0 Hub and 10/100 Ethernet Controller
Datasheet
TCK (Input)
t_tckp
t_tckhl
t_tckhl
t_su
t_h
TDI, TMS (Inputs)
t_dov
t_doh
TDO (Output)
Figure 4.3 JTAG Timing
Table 4.9 JTAG Timing Values
SYMBOL
DESCRIPTION
t_tckp
TCK clock period
t_tckhl
TCK clock high/low time
t_su
TDI, TMS setup to TCK rising edge
t_h
TDI, TMS hold from TCK rising edge
t_dov
TDO output valid from TCK falling edge
t_doh
TDO output hold from TCK falling edge
MIN
66.67
t_tckp*0.4
10
10
0
MAX
t_tckp*0.6
16
UNITS
ns
ns
ns
ns
ns
ns
NOTES
Revision 1.2 (02-29-12)
48
DATASHEET
SMSC LAN9514/LAN9514i