HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 245
![MPU 1.5/3.3V 0K PB-FREE 256-BGA](/photos/28/61/286175/256-lfbga_sml.jpg)
HD6417712BPV
Manufacturer Part Number
HD6417712BPV
Description
MPU 1.5/3.3V 0K PB-FREE 256-BGA
Manufacturer
Renesas Electronics America
Series
SuperH® SH Ethernetr
Datasheet
1.HD6417712BPV.pdf
(980 pages)
Specifications of HD6417712BPV
Core Processor
SH-3 DSP
Core Size
32-Bit
Speed
200MHz
Connectivity
EBI/EMI, Ethernet, FIFO, SCI, SIO
Peripherals
DMA, POR, WDT
Number Of I /o
24
Program Memory Type
ROMless
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
1.4 V ~ 1.6 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
256-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417712BPV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 245 of 980
- Download datasheet (6Mb)
Section 5 Memory Management Unit (MMU)
Recording a 1- or 4- kbyte page TLB entry may result in a synonym problem. See section 5.4.4,
Avoiding Synonym Problems.
5.4.3
MMU Instruction (LDTLB)
The load TLB instruction (LDTLB) is used to record TLB entries. When the IX bit in MMUCR is
0, the LDTLB instruction changes the TLB entry in the way specified by the RC bit in MMUCR
to the value specified by PTEH and PTEL, using VPN bits 16 to 12 specified in PTEH as the
index number. When the IX bit in MMUCR is 1, the EX-OR of VPN bits 16 to 12 specified in
PTEH and ASID bits 4 to 0 in PTEH are used as the index number.
Figure 5.11 shows the case where the IX bit in MMUCR is 0.
When an MMU exception occurs, the virtual page number of the virtual address that caused the
exception is set in PTEH by hardware. The way is set in the RC bit of MMUCR for each
exception according to the rules (see section 5.2.4, MMU Control Register (MMUCR)).
Consequently, if the LDTLB instruction is issued after setting only PTEL in the MMU exception
processing routine, TLB entry recording is possible. Any TLB entry can be updated by software
rewriting of PTEH and the RC bits in MMUCR.
As the LDTLB instruction changes address translation information, there is a risk of destroying
address translation information if this instruction is issued in the P0, U0, or P3 area. Make sure,
therefore, that this instruction is issued in the P1 or P2 area. Also, an instruction associated with an
access to the P0, U0, or P3 area (such as the RTE instruction) should be issued at least two
instructions after the LDTLB instruction.
Rev. 1.00 Dec. 27, 2005 Page 201 of 932
REJ09B0269-0100
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