R0K572030S000BE Renesas Electronics America, R0K572030S000BE Datasheet - Page 162

• 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

Section 5 Exception Handling
5.2.3
(1)
When the RES pin is driven low, this LSI enters the power-on reset state. To reliably reset this
LSI, the RES pin should be kept at the low level for the duration of the oscillation settling time at
power-on or when in software standby mode (when the clock is halted), or at least 20-tcyc
(unfixed) when the clock is running. In the power-on reset state, the internal state of the CPU and
all the on-chip peripheral module registers are initialized. See appendix A, Pin States, for the
status of individual pins during the power-on reset state.
In the power-on reset state, power-on reset exception handling starts when the RES pin is first
driven low for a fixed period and then returned to high. 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, the interrupt mask level bits (I3 to
4. The values fetched from the exception handling vector table are set in the PC and SP, and the
Be certain to always perform power-on reset processing when turning the system power on.
(2)
When the H-UDI reset assert command is set, this LSI enters the power-on reset state. Power-on
reset by means of an H-UDI reset assert command is equivalent to power-on reset by means of the
RES pin. Setting the H-UDI reset negate command cancels the power-on reset state. The time
required between an H-UDI reset assert command and H-UDI reset negate command is the same
as the time to keep the RES pin low to initiate a power-on reset. In the power-on reset state
generated by an H-UDI reset assert command, setting the H-UDI reset negate command starts
power-on reset exception handling. The CPU operates in the same way as when a power-on reset
was caused by the RES pin.
Rev. 3.00 Sep. 28, 2009 Page 130 of 1650
REJ09B0313-0300
exception handling vector table.
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 INTC is also initialized to 0. FPSCR is initialized to
H'00040001
program begins executing.
Power-On Reset by Means of RES Pin
Power-On Reset by Means of H-UDI Reset Assert Command
Power-On Reset