HD6417727BP160CV Datasheet, PDF (973/1098 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH™ RISC engine Family/ SH7700 Series

Section 31 User-Debugging Interface (H-UDI)
Section 31 User-Debugging Interface (H-UDI)
31.1 Overview
The SH7727 incorporates a user-debugging interface (H-UDI) and advanced user debugger
(AUD) for program debugging.
31.2 User Debugging Interface (H-UDI)
The H-UDI (user-debugging interface) performs on-chip debugging which is supported by the
SH7727. The H-UDI described here is a serial interface which is compatible with JTAG (Joint
Test Action Group, IEEE Standard 1149.1 and IEEE Standard Test Access Port and Boundary-
Scan Architecture) specifications.
The H-UDI in the SH7727 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.
31.2.1 Pin Description
TCK: H-UDI serial data input/output clock pin. Data is serially supplied to the H-UDI from the
data input pin (TDI), and output from the data output pin (TDO), in synchronization with this
clock.
TMS: Mode select input pin. The state of the TAP control circuit is determined by changing this
signal in synchronization with TCK. The protocol conforms to the JTAG standard (IEEE Std.
1149.1).
TRST: H-UDI reset input pin. Input is accepted asynchronously with respect to TCK, and when
low, the H-UDI is reset. See section 31.4.2, Reset Configuration, for more information.
TDI: H-UDI serial data input pin. Data transfer to the H-UDI is executed by changing this signal
in synchronization with TCK.
TDO: H-UDI serial data output pin. Data output from the H-UDI is executed by reading this
signal in synchronization with TCK.
ASEMD0: The ASE mode select pin. If a low level is input to the ASEMD0 pin while the
RESETP pin is asserted, ASE mode is entered, and if a high level is input, normal mode is
entered. When using the user system alone and not using an emulator or the H-UDI, a high level
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