QT2022/32 - Data Sheet: DS3051
Table 59: JTAG AC Parameters
Parameter
fmax
Description
Min
Typ
Max
10
Units
Conditions/Notes
TCK operating frequency
MHz
ns
Tsu
TDI, TMS input setup time requirement
TDI, TMS input hold time requirement
TDO output propagation delay
10
10
30
wrt TCK rising edge. See Note 11.
wrt TCK rising edge. See Note 1.
Thd
ns
Tdel
ns
See Note 1 and 22. 330ohm
pullup to 1.2V, or 750ohms to
3.3V, Cload = 50pF.
1. Timing is measured from the point where signals cross a voltage level equal to COREVDD/2.
2. For a rising TDO output, the delay is measured to a crossing level of 0.7*Vpu. For a falling TDO output, the
delay is measured to a crossing level of 0.3*Vpu. TDO is generated on the falling edge of TCK. TDI is
clocked in on the rising edge of TCK. Therefore TDO propagation delay must not exceed half a TCK period
minus the TDI setup time requirement.
Table 60: MDIO 1.2V Bidirectional Pad DC Parameters
Parameter
Description
output high voltage
Min
Typ
Max
Vpu
Units
Conditions/Notes
Ioh = -100μA
Voh
Ioff
V
Open-drain output off-state leakage
2.5
μA
at 2.5V
5.5
Vol = 0.2V (for 1.2V operation)
Vol = 0.6V (for 3.3V operation)
Iol
output low current
output low voltage
mA
V
8
Vol
0.2
Vpu = 1.2V with 180Ω pullup
resistor
Vih
input high voltage level
input low voltage level
pullup supply voltage
Input capacitance
0.84
V
3.3V tolerant
Vil
0.36
V
Vpu
Cin
1.2
V
5
pF
pF
Cload
Rpu
Load capacitance
470
Pullup Resistance
180
with 1.2V pullup voltage
with 3.3V pullup voltage
Ω
600
500
Table 61: MDIO AC Parameters
Parameter
Thold
Description
Min
Typ
Max
10
Units
ns
Conditions
wrt MDC rising edge
wrt MDC rising edge
MDIO data input hold time requirement
MDIO data input setup time requirement
Tsetup
10
ns
OPERATION UNDER HIGH CAPACITIVE LOAD (1.2V pullup)
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