HD6417720BP133BV Renesas Electronics America, HD6417720BP133BV Datasheet - Page 239
HD6417720BP133BV
Manufacturer Part Number
HD6417720BP133BV
Description
SH3-DSP, WITH USB AND LCDC, PB-F
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.R8A77210C133BAV.pdf
(1478 pages)
Specifications of HD6417720BP133BV
Core Processor
SH-3 DSP
Core Size
32-Bit
Speed
133MHz
Connectivity
FIFO, I²C, IrDA, MMC, SCI, SD, SIO, SIM, USB
Peripherals
DMA, LCD, POR, WDT
Number Of I /o
117
Program Memory Type
ROMless
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
1.4 V ~ 1.6 V
Data Converters
A/D 4x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
256-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
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SH7720 Group, SH7721 Group
4.3.3
The results of address comparison determine whether a specific virtual page number is registered
in the TLB. The virtual page number of the virtual address that accesses external memory is
compared to the virtual page number of the indexed TLB entry. The ASID within the PTEH is
compared to the ASID of the indexed TLB entry. All four ways are searched simultaneously. If
the compared values match, and the indexed TLB entry is valid (V bit = 1), the hit is registered.
It is necessary to have software ensure that TLB hits do not occur simultaneously in more than one
way, as hardware operation is not guaranteed if this occurs. An example of setting which causes
TLB hits to occur simultaneously in more than one way is described below. It is necessary to
ensure that this kind of setting is not made by software.
1. If there are two identical TLB entries with the same VPN and a setting is made such that a
2. If several entries which have different ASID with the same VPN are registered in single virtual
R01UH0083EJ0400 Rev. 4.00
Sep 21, 2010
TLB hit is made only by a process with ASID = H'FF when one is in the shared state (SH = 1)
and the other in the non-shared state (SH = 0), then if the ASID in PTEH is set to H'FF, there is
a possibility of simultaneous TLB hits in both these ways.
memory mode, there is the possibility of simultaneous TLB hits in more than one way when
accessing the corresponding page in privileged mode. Several entries with the same VPN must
not be registered in single virtual memory mode.
31
0
Virtual address
31
TLB Address Comparison
VPN(31 to 17)
Index
VPN(11 to 10)
17
Address array
16
Figure 4.9 TLB Indexing (IX = 0)
12
11
ASID(7 to 0)
0
V
Way 0 to 3
PPN(28 to 10) PR(1 to 0) SZ
Section 4 Memory Management Unit (MMU)
Data array
C
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