JTAG-HS2 Reference Manual
Doc: 502-249
page 5 of 5
Figure 7
TMS/TDI
TCK
TDO
T
CKL
T
CKH
T
CK
T
CD
T
SU
T
HD
Figure 8
Symbol
Parameter
Min
Max
T
CK
T
CK
period
33.3ns 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
DC Operating Characteristics
Symbol
Parameter
Min
Typ
Max
Unit
VDD (VREF)
I/O reference/supply voltage
1.65
2.5/3.3
5.5
Volts
TDO
Input High Voltage (V
IH
)
1.62
5.5
Volts
Input Low Voltage (V
IL
)
0
0.65
Volts
TMS, TCK, TDI
Output High (V
OH
)
0.85 x Vdd
0.95 x Vdd
Vdd
Volts
Output Low (V
OL
)
0
0.05 x Vdd
0.15 x Vdd
Volts
AC Operating Characteristics
The JTAG-HS2 JTAG signals and SPI
operate according to the timing diagram in
Figure 7. The HS2 supports TCK frequencies
from 30 MHz to 8 KHz at integer divisions of
30MHz from 1 to 3750. Common frequencies
include 30MHz, 15MHz, 10MHz, 7.5MHz, and
6HMz. (See Figure 8)
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