DM385 datasheet(169/281 Pages) TI

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DM385, DM388

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SPRS821D – MARCH 2013 – REVISED DECEMBER 2013

8.5.3.1

JTAG ID (JTAGID) Register Description

Table 8-4. JTAG ID Register(1)

HEX ADDRESS

ACRONYM

0x4814 0600

JTAGID

JTAG Identification Register(2)

(1)

IEEE Standard 1149.1-1990 Standard-Test-Access Port and Boundary Scan Architecture.

(2)

Read-only. Provides the device 32-bit JTAG ID.

The JTAG ID register is a read-only register that identifies to the customer the JTAG/device ID. For this

device, the JTAG ID register resides at address location 0x4814 0600. For the actual register bit names

and their associated bit field descriptions, see Figure 8-5 and Table 8-5.

28 27

12 11

VARIANT (4-

PART NUMBER (16-bit)

MANUFACTURER (11-bit)

LSB

bit)

R-xxxx

R-1011 1001 0110 1011

R-0000 0010 111

R-1

LEGEND: R/W = Read/Write; R = Read only; -n = value after reset

Figure 8-5. JTAG ID Register Description - Device Register Value: 0x0B8F 202F

Table 8-5. JTAG ID Register Selection Bit Descriptions

Bit

Field

Description

31:28

VARIANT

Variant (4-bit) value. Device value: xxxx. This value reflects the device silicon revision [For example, 0x0

(0000) for initial silicon (1.0)]. For more detailed information on the current device silicon revision, see the

device-specific Silicon Errata.

27:12

PART NUMBER

Part Number (16-bit) value. Device value: 0xB96B (1011 1001 0110 1011)

11:1

MANUFACTURER

Manufacturer (11-bit) value. Device value: 0x017 (0000 0010 111)

LSB

LSB. This bit is read as a ""1 for this device.

8.5.3.2

JTAG Electrical Data/Timing

Table 8-6. Timing Requirements for IEEE 1149.1 JTAG

(see Figure 8-6)

OPP100/OPP120/

Turbo/Nitro

NO.

UNIT

MIN

MAX

tc(TCK)

Cycle time, TCK

tw(TCKH)

Pulse duration, TCK high (40% of tc)

23.6

tw(TCKL)

Pulse duration, TCK low (40% of tc)

23.6

tsu(TDI-TCK)

Input setup time, TDI valid to TCK high (20% of (tc * 0.5))

5.9

tsu(TMS-TCK)

Input setup time, TMS valid to TCK high (20% of (tc * 0.5))

5.9

th(TCK-TDI)

Input hold time, TDI valid from TCK high

29.5

th(TCK-TMS)

Input hold time, TMS valid from TCK high

29.5

Table 8-7. Switching Characteristics Over Recommended Operating Conditions for IEEE 1149.1 JTAG

(see Figure 8-6)

OPP100/OPP120/

Turbo/Nitro

NO.

PARAMETER

UNIT

MIN

MAX

td(TCKL-TDOV)

Delay time, TCK low to TDO valid

23.575(1)

(1)

(0.5 * tc) - 2

Peripheral Information and Timings

169

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