HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 241

• Manufacturer Part Number: HD6417712BPV
• Description: MPU 1.5/3.3V 0K PB-FREE 256-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH Ethernetr

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: -

The object compared varies depending on the page management information (SZ, SH) in the TLB
entry. It also varies depending on whether the system supports multiple virtual memory or single
virtual memory.
The page-size information determines whether VPN (11 to 10) is compared. VPN (11 to 10) is
compared for 1-kbyte pages (SZ = 0) but not for 4-kbyte pages (SZ = 1).
The sharing information (SH) determines whether the PTEH.ASID and the ASID in the TLB entry
are compared. ASIDs are compared when there is no sharing between processes (SH = 0) but not
when there is sharing (SH = 1).
When single virtual memory is supported (MMUCR.SV = 1) and privileged mode is engaged
(SR.MD = 1), all process resources can be accessed. This means that ASIDs are not compared
when single virtual memory is supported and privileged mode is engaged. The objects of address
comparison are shown in figure 5.10.
registered in index mode. When memory is shared by several processings, different pages must
be registered in each ASID.
MMUCR.SV = 1)?
(SR.MD = 1 and
Bits Compared:
VPN 31 to 17
VPN 11 to 10
SH = 1 or
SZ = 0?
Yes
Yes (1-kbyte)
Figure 5.10 Objects of Address Comparison
Bits Compared:
VPN 31 to 17
No (4-kbyte)
No
Bits Compared:
VPN 31 to 17
VPN 11 to 10
ASID 7 to 0
Section 5 Memory Management Unit (MMU)
SZ = 0?
Rev. 1.00 Dec. 27, 2005 Page 197 of 932
Yes (1-kbyte)
Bits Compared:
VPN 31 to 17
ASID 7 to 0
No (4-kbyte)
REJ09B0269-0100