R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 229

• Manufacturer Part Number: R8A77800ANBGAV
• Description: IC SUPERH MPU ROMLESS 449-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77800ANBGAV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 75
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 449-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

7.5
There are seven MMU exceptions: instruction TLB multiple hit exception, instruction TLB miss
exception, instruction TLB protection violation exception, data TLB multiple hit exception, data
TLB miss exception, data TLB protection violation exception, and initial page write exception.
Refer to figures 7.9 and 7.10 for the conditions under which each of these exceptions occurs.
7.5.1
An instruction TLB multiple hit exception occurs when more than one ITLB entry matches the
virtual address to which an instruction access has been made. If multiple hits occur when the
UTLB is searched by hardware in hardware ITLB miss handling, an instruction TLB multiple hit
exception will result.
When an instruction TLB multiple hit exception occurs, a reset is executed and cache coherency is
not guaranteed.
Hardware Processing: In the event of an instruction TLB multiple hit exception, hardware carries
out the following processing:
1. Sets the virtual address at which the exception occurred in TEA.
2. Sets exception code H'140 in EXPEVT.
3. Branches to the reset handling routine (H'A000 0000).
Software Processing (Reset Routine): The ITLB entries which caused the multiple hit exception
are checked in the reset handling routine. This exception is intended for use in program
debugging, and should not normally be generated.
MMU Exceptions
Instruction TLB Multiple Hit Exception
Section 7 Memory Management Unit (MMU)
Rev.1.00 Dec. 13, 2005 Page 177 of 1286
REJ09B0158-0100