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3.6
JTAG ID (JTAGID) Register Description
SM320C6455-EP
FIXED-POINT DIGITAL SIGNAL PROCESSOR
SPRS462B – SEPTEMBER 2007 – REVISED JANUARY 2008
Table 3-13. Device Status Register (DEVSTAT) Field Descriptions (continued)
Bit
Field
Value
Description
3:0
BOOTMODE[3:0]
Boot mode configuration bits
Shows the status of what device boot mode configuration is operational.
BOOTMODE[3:0]
[
Note:
if selected for boot, the corresponding peripheral is automatically enabled after device reset.]
0000
No boot (default mode)
0001
Host boot (HPI)
0010
Reserved
0011
Reserved
0100
EMIFA 8 bit ROM boot
0101
Master I2C boot
0110
Slave I2C boot
0111
Host boot (PCI)
1000
Serial Rapid I/O boot For more detailed information on the boot modes, see
Section 2.4
,
Boot
thru
Sequence
, of this document.
1111
The JTAG ID register is a read-only register that identifies to the customer the JTAG/Device ID. For the
C6455 device, the JTAG ID register resides at address location 0x02A8 0008. For the actual register bit
names and their associated bit field descriptions, see
Figure 3-11
and
Table 3-14
.
31
28 27
12 11
1
0
VARIANT
PART NUMBER
MANUFACTURER
LSB
(4 bit)
(16 bit)
(11 bit)
R-n
R-0000 0000 1000 1010b
0000 0010 111b
R-1
LEGEND:
R = Read only; -
n
= value after reset
Figure 3-11. JTAG ID (JTAGID) Register - 0x02A8 0008
Table 3-14. JTAG ID (JTAGID) Register Field Descriptions
Bit
Field
Value
Description
31:28
VARIANT
Variant (4 Bit) value. The value of this field depends on the silicon revision being
used. For more information, see the
TMS320C6455 Digital Signal Processor
Silicon Errata
(literature number SPRZ234).
Note:
the VARIANT field may be invalid if no CLKIN1 signal is applied.
27:12
PART NUMBER
Part Number (16 Bit) value. C6455 value: 0000 0000 1000 1010b.
11:1
MANUFACTURER
Manufacturer (11 Bit) value. C6455 value: 0000 0010 111b.
0
LSB
LSB. This bit is read as a "1" for C6455.
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Device Configuration
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