SH7727 Datasheet, PDF (988/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 31 User-Debugging Interface (H-UDI)
entered. When using the user system alone and not using an emulator or the H-UDI, a high level
should be input. In ASE mode, boundary scan and emulator functions can be used. Hold the input
level to the ASEMD0 pin for at least one cycle after the RESETP pin is negated.
ASEBRKAK: Dedicated emulator pin.
31.2.2 Block Diagram
Figure 31.1 shows the block diagram of the H-UDI.
TDI
TDO
MUX
SDIR
SDID
TCK
TMS
TRST
TAP controller
Decoder
Local
bus
Figure 31.1 H-UDI Block Diagram
31.3 Register Descriptions
The H-UDI has the following registers.
• SDIR: instruction register
• SDID: device identification register
• SDBSR: boundary-scan register
Rev. 5.00 Dec 12, 2005 page 916 of 1034
REJ09B0254-0500