R5S72030W200FP Renesas Electronics America, R5S72030W200FP Datasheet - Page 253

• Manufacturer Part Number: R5S72030W200FP
• Description: IC SUPERH MPU ROMLESS 240QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7200r

Specifications of R5S72030W200FP

• Core Processor: SH2A-FPU
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: CAN, I²C, SCI, SSI, SSU, USB
• Peripherals: DMA, LCD, POR, PWM, WDT
• Number Of I /o: 82
• Program Memory Type: ROMless
• Ram Size: 80K x 8
• Voltage - Supply (vcc/vdd): 1.1 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 240-QFP
• For Use With: R0K572030S000BE - KIT DEV FOR SH7203HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -

(3)
With the 4-way set associative system, up to four instructions or data with the same entry address
can be registered in the cache. When an entry is registered, LRU shows which of the four ways it
is recorded in. There are six LRU bits, controlled by hardware. A least-recently-used (LRU)
algorithm is used to select the way that has been least recently accessed.
Six LRU bits indicate the way to be replaced in case of a cache miss. The relationship between
LRU and way replacement is shown in table 8.1 when the cache lock function (only for operand
cache) is not used (concerning the case where the cache lock function is used, see section 8.2.2,
Cache Control Register 2 (CCR2)). If a bit pattern other than those listed in table 8.1 is set in the
LRU bits by software, the cache will not function correctly. When modifying the LRU bits by
software, set one of the patterns listed in table 8.1.
The LRU bits are initialized to B'000000 by a power-on reset but not initialized by a manual reset
or in software standby mode.
Table 8.1
LRU (Bits 5 to 0)
000000, 000100, 010100, 100000, 110000, 110100
000001, 000011, 001011, 100001, 101001, 101011
000110, 000111, 001111, 010110, 011110, 011111
111000, 111001, 111011, 111100, 111110, 111111
LRU
LRU and Way Replacement (Cache Lock Function Not Used)
Rev. 3.00 Sep. 28, 2009 Page 221 of 1650
Way to be Replaced
3
2
1
0
REJ09B0313-0300
Section 8 Cache