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SH7261 Datasheet, PDF (1191/1348 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7260 Series
Section 28 User Debugging Interface (H-UDI)
28.4.4 H-UDI Reset
An H-UDI reset is executed by setting an H-UDI reset assert command in SDIR. An H-UDI reset
is of the same kind as a power-on reset. An H-UDI reset is released by setting an H-UDI reset
negate command. The required time between the H-UDI reset assert command and H-UDI reset
negate command is the same as time for keeping the RES pin low to apply a power-on reset.
SDIR
H-UDI reset assert
H-UDI reset negate
Chip internal
reset
CPU state
Fetch the initial values of PC and SR
from the exception handling vector table
Figure 28.4 H-UDI Reset
28.4.5 H-UDI Interrupt
The H-UDI interrupt function generates an interrupt by setting a command from the H-UDI in
SDIR. An H-UDI interrupt is a general exception/interrupt operation, resulting in fetching the
exception service routine start address from the exception handling vector table, jumping to that
address, and starting program execution from that address. This interrupt request has a fixed
priority level of 15.
H-UDI interrupts are accepted in sleep mode, but not in software standby or deep standby mode.
Rev. 2.00 Sep. 07, 2007 Page 1159 of 1312
REJ09B0320-0200