Figure 14.1 Block Diagram Of Boundary Scan Function - Hitachi H8S/2215 Series Hardware Manual

TDI
TCK
TMS
Legend:
BSCANR : Boundary scan register
IDCODE
BYPASS : BYPASS register
INSTR
TAP

Figure 14.1 Block Diagram of Boundary Scan Function

Rev. 3.0, 10/02, page 418 of 686
BSCANR
(Boundary scan cell chain)
TAP controller
: IDCODE register
: Instruction register
:Test access port
IDCODE
MUX
BYPASS
INSTR
TDO
MUX