HD6417712BPV Renesas Electronics America, HD6417712BPV Datasheet - Page 236

• 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: -

Section 5 Memory Management Unit (MMU)
Rev. 1.00 Dec. 27, 2005 Page 192 of 932
REJ09B0269-0100
Bit
31 to 9
8
7, 6
5, 4
3
2
1
Bit Name

SV

RC

TF
IX
Initial
Value
All 0
0
All 0
All 0
0
0
0
R/W
R
R/W
R
R/W
R
R/W
R/W
Description
These bits are always read as 0. The write value
should always be 0.
Single virtual memory mode
0: Multiple virtual memory mode
1: Single virtual memory mode
These bits are always read as 0. The write value
should always be 0.
A 2-bit random counter that is automatically updated
by hardware according to the following rules in the
event of an MMU exception.
When a TLB miss exception occurs, all of TLB entry
way corresponding to the virtual address at which
the exception occurred are checked. If all ways are
valid, 1 is added to RC; if there is one or more
invalid way, they are set by priority from way 0, in
the order way 0, way 1, way 2, way 3. In the event
of an MMU exception other than a TLB miss
exception, the way which caused the exception is
set in RC.
These bits are always read as 0. The write value
should always be 0.
TLB flush
Write 1 to flush the TLB (clear all valid bits of the
TLB to 0). When they are read, 0 is always returned.
Index mode
0: VPN bits 16 to 12 are used as the TLB index
1: The value obtained by EX-ORing ASID bits 4 to 0
Reserved
Reserved
Random counter
Reserved
number.
in PTEH and VPN bits 16 to 12 is used as the
TLB index number.