HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 239
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
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5.3.2
The TLB uses a 4-way set associative scheme, so entries must be selected by index. VPN bits 16
to 12 are used as the index number regardless of the page size. The index number can be generated
in two different ways depending on the setting of the IX bit in MMUCR.
1. When IX = 0, VPN bits 16 to 12 alone are used as the index number
2. When IX = 1, VPN bits 16 to 12 are EX-ORed with ASID bits 4 to 0 to generate a 5-bit index
The first method is used to prevent lowered TLB efficiency that results when multiple processes
run simultaneously in the same virtual address space (multiple virtual memory) and a specific
entry is selected by indexing of each process. In single virtual memory mode (MMUCR.SV = 1),
IX bit should be set to 0. Figures 5.8 and 5.9 show the indexing schemes.
number
TLB Indexing
31
0
Virtual Address
31
VPN(31-17)
Index
17
VPN(11-10)
Address Array
Figure 5.8 TLB Indexing (IX = 1)
16
12
11
ASID(7-0)
0
Exclusive-OR
V
Way 0 to 3
PPN(28-10) PR(1-0) SZ C
PTEH Register
31
Section 5 Memory Management Unit (MMU)
Rev. 1.00 Dec. 27, 2005 Page 195 of 932
VPN
Data Array
ASID(4-0)
10
0
D SH
REJ09B0269-0100
7
ASID
0
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