HD6417705F133V Datasheet, PDF (615/741 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Section 23 User Debugging Interface (UDI)
This LSI incorporates a user debugging interface (UDI) and advanced user debugger (AUD) for a
boundary scan function and emulator support.
This section describes the UDI. The AUD is a function exclusively for use by an emulator. Refer
to the User’s Manual for the relevant emulator for details of the AUD.
23.1 Features
The UDI (User Debugging Interface) is a serial I/O interface which supports with JTAG (Joint
Test Action Group, IEEE Standard 1149.1 and IEEE Standard Test Access Port and Boundary-
Scan Architecture) specifications.
The UDI in this LSI supports a boundary scan mode, and is also used for emulator connection.
When using an emulator, UDI functions should not be used. Refer to the emulator manual for the
method of connecting the emulator.
Figure 23.1 shows a block diagram of the UDI.
TDI
TDO
SDBPR
MUX
SDIR
SDID
TCK
TMS
TRST
TAP controller
Decoder
Local
bus
Figure 23.1 Block Diagram of UDI
Rev. 2.00, 09/03, page 567 of 690