D6417709SF167BV Renesas Electronics America, D6417709SF167BV Datasheet - Page 161

• Manufacturer Part Number: D6417709SF167BV
• Description: IC SUPER H MPU ROMLESS 208LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of D6417709SF167BV

• Core Processor: SH-3
• Core Size: 32-Bit
• Speed: 167MHz
• Connectivity: EBI/EMI, FIFO, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 96
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.75 V ~ 2.05 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 208-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

5.4.3
(1) Invalidating a Specific Entry
A specific cache entry can be invalidated by accessing the allocated memory cache and writing a 0
to the entry’s U and V bits. The A bit is cleared to 0, and an address is specified for the entry
address and the way. If the U bit of the way of the entry in question was set to 1, the entry is
written back and the V and U bits specified by the write data are written to.
In the following example, the write data is specified in R0 and the address is specified in R1.
To invalidate all entries and ways, write 0 to the following addresses.
This involves a total of 1,024 writes.
The above operation should be performed using a non-cacheable area.
(2) Invalidating a Specific Address
A specific address can be invalidated by writing a 0 to the entry’s U and V bits. When the A bit is
1, the tag address specified by the write data is compared to the tag address within the cache
selected by the entry address. If the tag addresses match, data is written to the memory at that
address. If no match is found, no operation is carried out. If the entry’s U bit is 1 at that time, the
entry is written back.
; R0 = H'0000 0000 LRU = H'000, U = 0, V = 0
; R1 = H'F000 1080, Way = 1, Entry = H'08, A = 0
;
; R0 = H'0110 0010; Tag address = B'0000 0001 0001 0000 0000 00, U = 0,
V = 0
; R1 = H'F000 0088; Address array access, Entry = H'08, A = 1
;
MOV.L R0, @R1
MOV.L R0, @R1
Addresses
Examples of Usage
F000 0000
F000 0010
F000 0020
F000 3FF0
:
Rev. 5.00, 09/03, page 115 of 760