SH7205 Datasheet, PDF (1615/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 31 User Debugging Interface (H-UDI)
Section 31 User Debugging Interface (H-UDI)
This LSI incorporates a user debugging interface (H-UDI) for the boundary scan function and
emulator support.
31.1 Features
The user debugging interface (H-UDI) is a serial input/output interface that supports JTAG (Joint
Test Action Group, IEEE Std.1149.1 and IEEE Standard Test Access Port and Boundary-Scan
Architecture).
The H-UDI of this LSI incorporates a boundary scan TAP controller and an emulation TAP
controller for controlling the H-UDI interrupt function. When the TRST pin is asserted, including
the case of power-on, the boundary scan TAP controller is selected. By inputting the emulation
TAP controller switching command, the emulation TAP controller is selected. To switch from the
emulation TAP controller to the boundary scan TAP controller, assert the TRST pin.
In ASE mode, the emulation TAP controller is selected. For connection with the emulator, see the
manual for the emulator.
Figure 31.1 shows a block diagram of the H-UDI.
TDI
TDO
TCK
TMS
TRST
Pin switching logic
TAP controller
for boundary scanning
BSBPR
BSIR
SDBSR
BSID
TAP controller
for emulation
SDBPR
SDIR
Figure 31.1 Block Diagram of H-UDI
Rev. 1.00 Mar. 25, 2008 Page 1583 of 1868
REJ09B0372-0100