Car Stereo System - Car Radio Digital Signal Processor User Manual

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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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