TMS320DM647_08 Datasheet, PDF (162/167 Pages) Texas Instruments – Digital Media Processor

TMS320DM647/TMS320DM648
Digital Media Processor
SPRS372A – MAY 2007 – REVISED JUNE 2007
BIT
31:28
27:12
11-1
0
Table 6-85. JTAGID Register Selection Bit Descriptions
NAME
DESCRIPTION
VARIANT
Variant (4-Bit) value. DM647/DM648 value: 0000.
PART NUMBER Part Number (16-Bit) value. DM647/DM648 value: 1011 0111 0111 1010.
MANUFACTURER Manufacturer (11-Bit) value. DM647/DM648 value: 0000 0010 111.
LSB
LSB. This bit is read as a 1 for DM647/DM648.
6.23.2 JTAG Electrical Data/Timing
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Table 6-86. Timing Requirements for JTAG Test Port (see Figure 6-48)
-720
NO.
-900
MIN
1
t_c(TCK)
Cycle time, TCK
10
3
t_{su(TDIV-TCKH)}
Setup time, TDI/TMS/TRST valid before TCK high
2
4
t_h(TCKH-TDIV)
Hold time, TDI/TMS/TRST valid after TCK high
0
MAX
20
UNIT
ns
ns
ns
Table 6-87. Switching Characteristics Over Recommended Operating Conditions for JTAG Test Port
(see Figure 6-48)
NO.
PARAMETER
-720
-900
MIN
UNIT
MAX
2
t_d(TCKL-TDOV)
Delay time, TCK low to TDO valid
0
0.25*tc(TC
K)
ns
TCK
TDO
TDI/TMS/TRST
1
2
2
4
3
Figure 6-48. JTAG Test-Port Timing
162 Peripheral Information and Electrical Specifications
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