SH7710 Datasheet, PDF (837/996 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 23 User Debugging Interface (H-UDI)
Pin Name
ASEBRKAK
AUDSYNC
AUDATA3 to 0
AUDCK
Input/Output
Output
Output
Output
Output
Description
Dedicated emulator pin
23.3 Register Descriptions
The H-UDI has the following registers. Refer the section 24, List of Registers, for the addresses
and access size for registers.
• Bypass register (SDBPR)
• Instruction register (SDIR)
• Boundary scan register (SDBSR)
• ID register (SDID)
23.3.1 Bypass Register (SDBPR)
SDBPR is a 1-bit register that cannot be accessed by the CPU. When SDIR is set to the bypass
mode, SDBPR is connected between H-UDI pins TDI and TDO. The initial value is undefined but
SDBPR is initialized to 0 if the TAP is in Capture-DR state.
23.3.2 Instruction Register (SDIR)
SDIR is a 16-bit read-only register. The register is in JTAG IDCODE in its initial state. It is
initialized by TRST assertion or in the TAP test-logic-reset state, and can be written to by the H-
UDI irrespective of the CPU mode. Operation is not guaranteed if a reserved command is set in
this register.
Rev. 2.00 Dec. 07, 2005 Page 795 of 950
REJ09B0079-0200