r8a77850anbg Renesas Electronics Corporation., r8a77850anbg Datasheet - Page 1534

• Manufacturer Part Number: r8a77850anbg
• Description: Renesas 32-bit Risc Microcomputer Superh? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

30. User Debugging Interface (H-UDI)
Rev.1.00 Jan. 10, 2008 Page 1504 of 1658
REJ09B0261-0100
Status
H-UDI
selection
Status
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
TRST
H-UDI switching command (B'00001000)
TMS
TCK
TRST is
asserted
TDI
(when Shift-IR state > 8 cycles,
input of last 8 cycles is valid)
H-UDI switching command is input to
boundary-scan TAP controller
Run-Test-Idle
0 0 0 1 0 0 0 0
Shift-IR
controller has entered the Run-Test/Idle state
first tck cycle after the boundary-scan TAP
Switchover is determined at falling of
Run-Test-Idle
H-UDI is used
Shift-IR
TRST is
asserted