R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 224
R0K572030S000BE
Manufacturer Part Number
R0K572030S000BE
Description
KIT DEV FOR SH7203
Manufacturer
Renesas Electronics America
Series
Renesas Starter Kits (RSK)r
Type
MCUr
Specifications of R0K572030S000BE
Contents
CPU Board, LCD Module, E10A-Lite Emulator, Cable, QuickStart Guide and CD-ROM
Silicon Manufacturer
Renesas
Kit Contents
Board
Silicon Family Name
SH7203
Silicon Core Number
R5S72030W200FP
Tool / Board Applications
General Purpose MCU, MPU, DSP, DSC
Mcu Supported Families
SH7203
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
SH7203
Lead Free Status / Rohs Status
Compliant
- Current page: 224 of 1686
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Section 6 Interrupt Controller (INTC)
6.8.4
There are two register bank exceptions (register bank errors): register bank overflow and register
bank underflow.
(1)
This exception occurs if, after data has been saved to all of the register banks, an interrupt for
which register bank use is allowed is accepted by the CPU, and the BOVE bit in the bank number
register (IBNR) is set to 1. In this case, the bank number bit (BN) value in the bank number
register (IBNR) remains set to the bank count of 15 and saving is not performed to the register
bank.
(2)
This exception occurs if the RESBANK (restore from register bank) instruction is executed when
no data has been saved to the register banks. In this case, the values of R0 to R14, GBR, MACH,
MACL, and PR do not change. In addition, the bank number bit (BN) value in the bank number
register (IBNR) remains set to 0.
6.8.5
When a register bank error occurs, register bank error exception handling starts. When this
happens, the CPU operates as follows:
1. The exception service routine start address which corresponds to the register bank error that
2. The status register (SR) is saved to the stack.
3. The program counter (PC) is saved to the stack. The PC value saved is the start address of the
4. Program execution starts from the exception service routine start address.
Rev. 3.00 Sep. 28, 2009 Page 192 of 1650
REJ09B0313-0300
occurred is fetched from the exception handling vector table.
instruction to be executed after the last executed instruction for a register bank overflow, and
the start address of the executed RESBANK instruction for a register bank underflow. To
prevent multiple interrupts from occurring at a register bank overflow, the interrupt priority
level that caused the register bank overflow is written to the interrupt mask level bits (I3 to I0)
of the status register (SR).
Register Bank Overflow
Register Bank Underflow
Register Bank Exception
Register Bank Error Exception Handling
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