dsp56854 Freescale Semiconductor, Inc, dsp56854 Datasheet - Page 49

• Manufacturer Part Number: dsp56854
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

4.13 JTAG Timing
Freescale Semiconductor
Operating Conditions: V
TCK frequency of operation
TCK cycle time
TCK clock pulse width
TMS, TDI data setup time
TMS, TDI data hold time
TCK low to TDO data valid
TCK low to TDO tri-state
TRST assertion time
DE assertion time
SCI receive
SCI receive
1.
operation, T = 8.33ns.
2.
3.
data pin
data pin
Timing is both wait state and frequency dependent. For the values listed, T = clock cycle. For 120MHz
TCK frequency of operation must be less than 1/4 the processor rate.
Parameters listed are guaranteed by design.
(Input)
(Input)
RXD
TXD
SS
Characteristic
= V
SSIO
2
= V
SSA
= 0 V, V
Figure 4-31 RXD Pulse Width
Figure 4-32 TXD Pulse Width
Table 4-14 JTAG Timing
DD
56854 Technical Data, Rev. 6
= 1.62-1.98V, V
RXD
TXD
PW
PW
DDIO
= V
Symbol
DDA
t
TRST
t
f
t
t
t
t
t
t
PW
OP
DH
CY
DS
DV
TS
DE
= 3.0–3.6V, T
1, 3
A
33.3
16.6
Min
DC
4T
35
= –40° to +120°C, C
—
—
3
3
Max
30
12
10
—
—
—
—
—
—
L
≤ 50pF, f
op
= 120MHz
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
JTAG Timing
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