D6417729RHF200BV Renesas Electronics America, D6417729RHF200BV Datasheet - Page 161

IC SUPER H MPU ROMLESS 208QFP

D6417729RHF200BV

Manufacturer Part Number
D6417729RHF200BV
Description
IC SUPER H MPU ROMLESS 208QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet

Specifications of D6417729RHF200BV

Core Processor
SH-3 DSP
Core Size
32-Bit
Speed
200MHz
Connectivity
EBI/EMI, FIFO, IrDA, SCI, SmartCard
Peripherals
DMA, POR, WDT
Number Of I /o
96
Program Memory Type
ROMless
Ram Size
32K x 8
Voltage - Supply (vcc/vdd)
1.85 V ~ 2.15 V
Data Converters
A/D 8x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
208-QFP Exposed Pad, 208-eQFP, 208-HQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-

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3.5.4
An initial page write exception occurs in a write access when the virtual address and the address
array of the selected TLB entry are compared and a valid entry with the appropriate access rights
is found to match, but the D (dirty) bit of the entry is 0 (the page has not been written to). Initial
page write exception handling includes both hardware and software operations.
Hardware Operations: In an initial page write exception, the SH7729R hardware executes a set
of prescribed operations, as follows:
1. The VPN field of the virtual address causing the exception is written to the PTEH register.
2. The virtual address causing the exception is written to the TEA register.
3. Exception code H'080 is written to the EXPEVT register.
4. The PC value indicating the address of the instruction in which the exception occurred is
5. The contents of SR at the time of the exception are written to SSR.
6. The MD bit in SR is set to 1 to place the SH7729R in privileged mode.
7. The BL bit in SR is set to 1 to mask any further exception reque sts.
8. The register bank (RB) bit in SR is set to 1.
9. The way that caused the exception is set in the RC field in MMUCR.
10. Execution branches to the address obtained by adding the value of the VBR contents and
Software (Initial Page Write Handler) Operations: The software must execute the following
operations:
1. Retrieve the required page table entry from external memory.
2. Set the D bit of the page table entry in external memory to 1.
3. Write the value of the PPN field and the PR, SZ, C, D, SH, and V bits of the page table entry
4. If using software for way selection for entry replacement, write the desired value to the RC
5. Issue an LDTLB instruction to load the contents of PTEH and PTEL into the TLB.
6. Issue an RTE instruction to terminate the handler and return to the instruction stream. The RTE
Figure 3.11 shows the flowchart for MMU exceptions.
written to SPC. If the exception occurred in a delay slot, the PC value indicating the address of
the related delayed branch instruction is written to SPC.
H'00000100 to invoke the user-written initial page write exception handler.
in the external memory to the PTEL register.
field in MMUCR.
instruction should be issued after two LDTLB instructions.
Initial Page Write Exception
Rev. 5.0, 09/03, page 113 of 806

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