D6417729RHF200BV Renesas Electronics America, D6417729RHF200BV Datasheet - Page 196

• Manufacturer Part Number: D6417729RHF200BV
• Description: IC SUPER H MPU ROMLESS 208QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of D6417729RHF200BV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, FIFO, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 96
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.85 V ~ 2.15 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 208-QFP Exposed Pad, 208-eQFP, 208-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Table 5.6
LRU (5–0)
000000, 000001, 000011, 000100, 000110, 000111, 001011, 001111,
010100, 010110, 011110, 011111
100000, 100001, 101001, 101011, 110000, 110100, 111000, 111001,
111011, 111100, 111110, 111111
5.3
5.3.1
If the cache is enabled, whenever instructions or data in memory are accessed the cache will be
searched to see if the desired instruction or data is in the cache. Figure 5.4 illustrates the method
by which the cache is searched. The cache is a physical cache and holds physical addresses in its
address section.
Entries are selected using bits 11–4 of the address (virtual) of the access to memory and the
address tag of that entry is read. In parallel to reading of the address tag, the virtual address is
translated to a physical address in the MMU. The physical address after translation and the
physical address read from the address section are compared. The address comparison uses all four
ways. When the comparison shows a match and the selected entry is valid (V = 1), a cache hit
occurs. When the comparison does not show a match or the selected entry is not valid (V = 0), a
cache miss occurs. Figure 5.4 shows a hit on way 1.
Rev. 5.0, 09/03, page 148 of 806
Cache Operation
Searching the Cache
LRU and Way Replacement (when W2LOCK=1 and W3LOCK=1)
Way to be Replaced
1
0