TMS320C6678
Multicore Fixed and Floating-Point Digital Signal Processor
SPRS691D—April 2013
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3.3.2 Device Configuration Register
The Device Configuration Register is one-time writeable through software. The register is reset on all hard resets
and is locked after the first write. The Device Configuration Register is shown in Figure 3-2 and described in
Table 3-4.
Figure 3-2
Device Configuration Register (DEVCFG)
31
1
0
Reserved
R-0
SYSCLKOUTEN
R/W-1
Legend: R = Read only; RW = Read/Write; -n = value after reset
Table 3-4
Device Configuration Register Field Descriptions
Bit
31-1
0
Field
Description
Reserved
Reserved. Read only, writes have no effect.
SYSCLKOUTEN
SYSCLKOUT Enable
0 = No clock output
1 = Clock output enabled (default)
End of Table 3-4
3.3.3 JTAG ID (JTAGID) Register Description
The JTAG ID register is a read-only register that identifies to the customer the JTAG/Device ID. For the device, the
JTAG ID register resides at address location 0x0262 0018. The JTAG ID Register is shown in Figure 3-3 and
described in Table 3-5.
Figure 3-3
JTAG ID (JTAGID) Register
31
28
27
12
11
1
0
VARIANT
R-xxxxb
PART NUMBER
MANUFACTURER
0000 0010 111b
LSB
R-1
R-0000 0000 1001 1110b
Legend: RW = Read/Write; R = Read only; -n = value after reset
Table 3-5
JTAG ID Register Field Descriptions
Bit
Field
Value
Description
Variant (4-Bit) value.
31-28 VARIANT
xxxxb
27-12 PART NUMBER
0000 0000 1001 1110b Part Number for boundary scan
11-1
0
MANUFACTURER
LSB
0000 0010 111b
1b
Manufacturer
This bit is read as a 1 for TMS320C6678
End of Table 3-5
Note—The value of the VARIANT and PART NUMBER fields depend on the silicon revision being used.
See the Silicon Errata for details.
80
Device Configuration
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