TMS320DM643 datasheet(151/160 Pages) TI

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5.19.2

JTAG Peripheral Register Description(s)

5.19.3

JTAG Test-Port Electrical Data/Timing

TCK

TDO

TDI/TMS/TRST

TMS320DM643

Video/Imaging Fixed-Point Digital Signal Processor

SPRS269A – FEBRUARY 2005 – REVISED APRIL 2005

Table 5-79. JTAG ID Register Selection Bit Descriptions

BIT

NAME

DESCRIPTION

31:28

VARIANT

Variant (4-Bit) value. DM643 value: 0000.

27:12

PART NUMBER

Part Number (16-Bit) value. DM643 value: 0000 0000 0111 1001.

11–1

MANUFACTURER

Manufacturer (11-Bit) value. DM643 value: 0000 0010 111.

LSB

LSB. This bit is read as a "1" for DM643.

Table 5-80. JTAG ID Register

HEX ADDRESS RANGE

ACRONYM

COMMENTS

Read-only. Provides 32-bit

01B3 F008

JTAGID

JTAG Identification Register

JTAG ID of the device.

Table 5-81. Timing Requirements for JTAG Test Port (see Figure 5-68)

–500

–600

NO.

UNIT

MIN

MAX

tc(TCK)

Cycle time, TCK

tsu(TDIV-TCKH)

Setup time, TDI/TMS/TRST valid before TCK high

th(TCKH-TDIV)

Hold time, TDI/TMS/TRST valid after TCK high

Table 5-82. Switching Characteristics Over Recommended Operating Conditions for JTAG Test Port

(see Figure 5-68)

–500

–600

NO.

PARAMETER

UNIT

MIN

MAX

td(TCKL-TDOV)

Delay time, TCK low to TDO valid

Figure 5-68. JTAG Test-Port Timing

DM643 Peripheral Information and Electrical Specifications

151

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