HD6417618 RENESAS [Renesas Technology Corp], HD6417618 Datasheet - Page 102
HD6417618
Manufacturer Part Number
HD6417618
Description
32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7618 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417618.pdf
(646 pages)
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Section 5 Exception Handling
Power-On Reset by WDT: When TCNT of the WDT overflows while a setting is made so that a
power-on reset can be generated in watchdog timer mode of the WDT, this LSI enters the power-
on reset state.
If a reset caused by the signal input on the RES pin and a reset caused by a WDT overflow occur
simultaneously, the RES pin reset has priority, and the WOVF bit in RSTCSR is cleared to 0.
When the power-on reset exception handling caused by the WDT is started, the CPU operates as
follows:
1. The initial value (execution start address) of the program counter (PC) is fetched from the
2. The initial value of the stack pointer (SP) is fetched from the exception handling vector table.
3. The vector base register (VBR) is cleared to H'00000000 and the interrupt mask bits (I3 to I0)
4. The values fetched from the exception handling vector table are set in the PC and SP, then the
5.2.3
The H-UDI reset is generated by issuing the H-UDI reset assert command. The CPU operation is
described below. For details, see section 19, User Debugging Interface (H-UDI).
1. The initial value (execution start address) of the program counter (PC) is fetched from the
2. The initial value of the stack pointer (SP) is fetched from the exception handling vector table.
3. The vector base register (VBR) is cleared to H'00000000 and the interrupt mask bits (I3 to I0)
4. The values fetched from the exception handling vector table are set in PC and SP, then the
Rev. 6.00 Jun. 12, 2007 Page 70 of 610
REJ09B0131-0600
exception handling vector table.
of the status register (SR) are set to H'F (B'1111).
program starts.
exception handling vector table.
in the status register (SR) are set to H'F (B'1111).
program starts.
H-UDI Reset
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