HD6417011VX20V Renesas Electronics America, HD6417011VX20V Datasheet - Page 67

• Manufacturer Part Number: HD6417011VX20V
• Description: MPU 5V 0K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7010r

Specifications of HD6417011VX20V

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: POR, PWM
• Number Of I /o: 11
• Program Memory Type: ROMless
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 7x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

5.8
5.8.1
The value of the stack pointer must always be a multiple of four. If it is not, an address error will
occur when the stack is accessed during exception processing.
5.8.2
The value of the vector base register must always be a multiple of four. If it is not, an address error
will occur when the stack is accessed during exception processing.
5.8.3
When the stack pointer is not a multiple of four, an address error will occur during stacking of the
exception processing (interrupts, etc.) and address error exception processing will start up as soon
as the first exception processing is ended. Address errors will then also occur in the stacking for
this address error exception processing. To ensure that address error exception processing does not
go into an endless loop, no address errors are accepted at that point. This allows program control
to be shifted to the address error exception service routine and enables error processing.
When an address error occurs during exception processing stacking, the stacking bus cycle (write)
is executed. During stacking of the status register (SR) and program counter (PC), the SP is –4 for
both, so the value of SP will not be a multiple of four after the stacking either. The address value
output during stacking is the SP value, so the address where the error occurred is itself output.
This means the write data stacked will be undefined.
56
Notes on Use
Value of Stack Pointer (SP)
Value of Vector Base Register (VBR)
Address Errors Caused by Stacking of Address Error Exception Processing