Renesas SH7641 - Manual (Page 505)

Section 15 User Debugging Interface (H-UDI)
Rev. 4.00 Sep. 14, 2005 Page 455 of 982
REJ09B0023-0400
Section 15 User Debugging Interface (H-UDI)
This LSI incorporates a user debugging interface (H-UDI) and advanced user debugger (AUD) for
a boundary scan function and emulator support.
This section describes the H-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.
15.1 Features
The user debugging interface (H-UDI) is a serial I/O interface which conforms to JTAG (Joint
Test Action Group, IEEE Standard 1149.1 and IEEE Standard Test Access Port and Boundary-
Scan Architecture) specifications.
The H-UDI in this LSI supports a boundary scan mode, and is also used for emulator connection.
When using an emulator, H-UDI functions should not be used. Refer to the emulator manual for
the method of connecting the emulator.
Figure 15.1 shows a block diagram of the H-UDI.
SDIR
SDID
TCK
TDO
TDI
TMS
SDBPR
MUX
SDBSR
Shift register
TAP controller Decoder
Local
bus
TRST
Figure 15.1 Block Diagram of H-UDI