SM320C6455-EP

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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

 

3.6JTAG ID (JTAGID) Register Description

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 3-11and 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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Texas Instruments SM320C6455-EP Jtag ID Jtagid Register Description, BOOTMODE30, Variant Part Number Manufacturer LSB