Digilent 210-299P-KIT - Manual (Page 6)

JTAG-HS3 Reference Manual
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Page 6 of 6
DC Operating Characteristics
Symbol Parameter Min Typ Max Unit
Vref I/O reference/supply voltage 1.65 1.8/2.5/3.3 5.5 Volts
TDO
Input High Voltage (V
IH
) 1.4 5.5 Volts
Input Low Voltage (V
IL
) 0 0.45 Volts
TMS, TCK, TDI
Output High (V
OH
) 0.75 x Vref 0.90 x Vref Vref Volts
Output Low (V
OL
) 0 0.05 x Vref 0.15 x Vref Volts
SRST
Output Low (V
OL
)
(R
PU
= 1.5K ohm)
0 0.4 0.55 Volts
T
A
Operating Temperature 0 70 ºC
AC Operating Characteristics
The JTAG-HS3 JTAG signals operate according to the timing diagram in Fig. 7. The HS3 supports TCK frequencies
from 30 MHz to 8 KHz at integer divisions of 30 MHz from 1 to 3750. Common frequencies include 30 MHz, 15
MHz, 10 MHz, 7.5 MHz, and 6 MHz (see Table 4).
TMS/TDI
TCK
TDO
T
CKL
T
CKH
T
CK
T
CD
T
SU
T
HD
Symbol Parameter Min Max
T
CK
T
CK
period 33ns 125µs
T
CKH
, T
CKL
T
CLK
pulse width 16.6ns 62.5µs
T
CD
T
CLK
to TMS, TDI 0 15ns
T
SU
TDO Setup time 19ns
T
HD
TDO Hold time 0
Figure 7. Timing diagram. Table 4. JTAG-HS3 Frequency support.