Rainbow-electronics Atmega169L Manuel d'utilisateur télécharger pdf (Page 232)

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ATmega169V/L

2514A–AVR–08/02

Bypass Register The Bypass Register consists of a single Shift Register stage. When the Bypass Regis-

ter is selected as path between TDI and TDO, the register is reset to 0 when leaving the

Capture-DR controller state. The Bypass Register can be used to shorten the scan

chain on a system when the other devices are to be tested.

Device Identification Register Figure 106 shows the structure of the Device Identification Register.

Figure 106. The Format of the Device Identification Register

Version

Version is a 4-bit number identifying the revision of the component. The relevant version

number is shown in Table 100.

Part Number

The part number is a 16-bit code identifying the component. The JTAG Part Number for

ATmega169 is listed in Table 101.

Manufacturer ID

The Manufacturer ID is a 11-bit code identifying the manufacturer. The JTAG manufac-

turer ID for ATMEL is listed in Table 102.

MSB

LSB

Bit

31 28 27 12 11 1 0

Device ID Version Part Number Manufacturer ID 1

4bits 16bits 11bits 1-bit

Table 100. JTAG Version Numbers

Version JTAG Version Number (Hex)

ATmega169 revision A 0x0

Table 101. AVR JTAG Part Number

Part Number JTAG Part Number (Hex)

ATmega169 0x9405

Table 102. Manufacturer ID

Manufacturer JTAG Manufactor ID (Hex)

ATMEL 0x01F

1 2 ... 227 228 229 230 231 232 233 234 235 236 237 ... 316 317

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Rainbow-electronics Atmega169L Manuel d'utilisateur Page 232