
Device Configurations
58
April 2003 Revised June 2004
SPRS219D
Table 27. Device Status (DEVSTAT) Register Selection Bit Descriptions (Continued)
NAME
DESCRIPTION
BIT
6
CLKMODE1
Clock mode select bits
Shows the status of whether the CPU clock frequency equals the input clock frequency X1 (Bypass), x6,
or x12.
Clock mode select for CPU clock frequency (CLKMODE[1:0])
00 –
Bypass (x1) (default mode)
01
x6
10
x12
11
Reserved
For more details on the CLKMODE pins and the PLL multiply factors, see the Clock PLL section of this
data sheet.
Device Endian mode (LEND)
Shows the status of whether the system is operating in Big Endian mode or Little Endian mode (default).
0
–
System is operating in Big Endian mode
1
System is operating in Little Endian mode (default)
5
CLKMODE0
4
LENDIAN
3
BOOTMODE1
Bootmode configuration bits
Shows the status of what device bootmode configuration is operational.
Bootmode [1:0]
00 –
No boot (default mode)
01
HPI/PCI boot (based on PCI_EN pin)
10
Reserved
11
EMIFA boot
2
BOOTMODE0
1
AECLKINSEL1
EMIFA input clock select
Shows the status of what clock mode is enabled or disabled for the EMIF.
Clock mode select for EMIFA (AECLKIN_SEL[1:0])
00 –
AECLKIN (default mode)
01
CPU/4 Clock Rate
10
CPU/6 Clock Rate
11
Reserved
0
AECLKINSEL0
2.6
JTAG ID Register Description
The JTAG ID register is a read-only register that identifies to the customer the JTAG/Device ID. For the C6412
device, the JTAG ID register resides at address location 0x01B3 F008. The register hex value for the C6412
device is: 0x0007 902F. For the actual register bit names and their associated bit field descriptions, see
Figure 25 and Table 28.
3128
2712
111
0
VARIANT (4-Bit)
PART NUMBER (16-Bit)
MANUFACTURER (11-Bit)
LSB
R-0000
R-0000 0000 0111 1001
R-0000 0010 111
R-1
Legend:
R = Read only; -n = value after reset
Figure 25. JTAG ID Register Description TMS320C6412 Register Value 0x0007 902F
Table 28. JTAG ID Register Selection Bit Descriptions
BIT
NAME
DESCRIPTION
31:28
VARIANT
Variant (4-Bit) value. C6412 value: 0000.
27:12
PART NUMBER
Part Number (16-Bit) value. C6412 value: 0000 0000 0111 1001.
111
MANUFACTURER
Manufacturer (11-Bit) value. C6412 value: 0000 0010 111.
0
LSB
LSB. This bit is read as a “1” for C6412.