SH7785 Datasheet, PDF (1534/1692 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

30. User Debugging Interface (H-UDI)
TRST is
asserted
H-UDI switching command is input to
boundary-scan TAP controller
TCK
TMS
TRST
TDI
H-UDI switching command (B'00001000)
(when Shift-IR state > 8 cycles,
input of last 8 cycles is valid)
00010000
Status
Shift-IR
H-UDI
selection
H-UDI is used
Run-Test-Idle
Switchover is determined at falling of
first tck cycle after the boundary-scan TAP
controller has entered the Run-Test/Idle state
TRST is
asserted
Status
Run-Test-Idle
Shift-IR
Note: The hatched sections represent the functions connected to the external pins.
Figure 30.2 Sequence to Switch from Boundary-Scan TAP Controller to H-UDI
Rev.1.00 Jan. 10, 2008 Page 1504 of 1658
REJ09B0261-0100