R0K572115S000BE Renesas Electronics America, R0K572115S000BE Datasheet - Page 106

• Manufacturer Part Number: R0K572115S000BE
• Description: KIT STARTER FOR SH7211
• Manufacturer: Renesas Electronics America
• Series: Renesas Starter Kits (RSK)r
• Type: Microcontrollerr

Specifications of R0K572115S000BE

• Contents: CPU Board, LCD Display Module, E8 Emulator, Cable, QuickStart Guide and CD-ROM
• For Use With/related Products: SH7211
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

When exception handling starts, the CPU operates as follows:
(1)
The initial values of the program counter (PC) and stack pointer (SP) are fetched from the
exception handling vector table (PC and SP are respectively the H'00000000 and H'00000004
addresses for power-on resets and the H'00000008 and H'0000000C addresses for manual resets).
See section 5.1.3, Exception Handling Vector Table, for more information. The vector base
register (VBR) is then initialized to H'00000000, the interrupt mask level bits (I3 to I0) of the
status register (SR) are initialized to H'F (B'1111), and the BO and CS bits are initialized. The BN
bit in IBNR of the interrupt controller (INTC) is also initialized to 0. The program begins running
from the PC address fetched from the exception handling vector table.
(2)
SR and PC are saved to the stack indicated by R15. In the case of interrupt exception handling
other than NMI or UBC with usage of the register banks enabled, general registers R0 to R14,
control register GBR, system registers MACH, MACL, and PR, and the vector number of the
interrupt exception handling to be executed are saved to the register banks. In the case of
exception handling due to an address error, register bank error, NMI interrupt, UBC interrupt, or
instruction, saving to a register bank is not performed. When saving is performed to all register
banks, automatic saving to the stack is performed instead of register bank saving. In this case, an
interrupt controller setting must have been made so that register bank overflow exceptions are not
accepted (the BOVE bit in IBNR of the INTC is 0). If a setting to accept register bank overflow
exceptions has been made (the BOVE bit in IBNR of the INTC is 1), register bank overflow
exception will be generated. In the case of interrupt exception handling, the interrupt priority level
is written to the I3 to I0 bits in SR. In the case of exception handling due to an address error or
instruction, the I3 to I0 bits are not affected. The start address is then fetched from the exception
handling vector table and the program begins running from that address.
Rev. 3.00 Mar. 04, 2009 Page 80 of 1168
REJ09B0344-0300
Exception Handling Triggered by Reset
Exception Handling Triggered by Address Errors, Register Bank Errors, Interrupts,
and Instructions