peb20560 Infineon Technologies Corporation, peb20560 Datasheet - Page 205

• Manufacturer Part Number: peb20560
• Description: Dsp Oriented Pbx Controller Doc
• Manufacturer: Infineon Technologies Corporation

2.16.2
The TAP contoller implements a state machine defined in the JTAG standard
IEEE1149.1.
The instruction register of the controller is extended to 4 bits in order to increase the
number of instructions. This is necessary for the use of the Serial Emulation via the
boundary scan interface:
Table 2-38 Instruction Code of 4 Bit TAP Controller
Instruction
EXTEST
INTEST
SAMPLE / PRELOAD
IDCODE
Serial Emulation
Unused
BYPASS
The extended TAP controller uses a modified data path:
Table 2-39 Data Path of 4 Bit TAP Controller
Instruction Code
11xx
000x, 0010
0011
01xx
10xx
The next paragraph specifies the functionality of each instruction:
• IDCODE, the 32-bit identification register is serially read out via TDO. It contains the
TDI →
Semiconductor Group
version number (4 bit), the device code (16 bit) and the manufacturer code (11 bits).
The LSB is fixed to ‘1’.
Ver. No.
0001
0000 = DOC V1.1
0001 = DOC V2.1
TAP-Controller
Input
TDI
BSOUT
BSOUT_ID
TDI2: SEIB:TDO (internal)
TDI3:
V
SS
Device Code
(Part Number)
0000 0000 0011 1000 0000 1000 001
(not used, internal)
2-159
Code
0000
0001
0010
0011
01xx
10xx
11xx
Manufacturer
Code (ID)
Functional Block Description
Data Path
→
→
→
→
→
Output
TDO
TDO
TDO
TDO
TDO
1
PEB 20560
→ TDO
2003-08