HD6417720BP133BV Renesas Electronics America, HD6417720BP133BV Datasheet - Page 260

• Manufacturer Part Number: HD6417720BP133BV
• Description: SH3-DSP, WITH USB AND LCDC, PB-F
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417720BP133BV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 133MHz
• Connectivity: FIFO, I²C, IrDA, MMC, SCI, SD, SIO, SIM, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 117
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Data Converters: A/D 4x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Section 5 Cache
5.2.1
The cache is enabled or disabled using the CE bit in CCR1. CCR1 also has a CF bit (which
invalidates all cache entries), and WT and CB bits (which select either write-through mode or
write-back mode). Programs that change the contents of the CCR1 register should be placed in
address space that is not cached.
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Bit
31 to 4 ⎯
3
2
1
0
Bit Name
CF
CB
WT
CE
Cache Control Register 1 (CCR1)
Initial
Value
All 0
0
0
0
0
R/W
R
R/W
R/W
R/W
R/W
Description
These bits are always read as 0. The write value should
always be 0.
Writing 1 flushes all cache entries (clears the V, U, and
LRU bits of all cache entries to 0). This bit is always
read as 0. Write-back to external memory is not
performed when the cache is flushed.
Write-Back
Indicates the cache’s operating mode for space P1.
0: Write-through mode
1: Write-back mode
Write-Through
Indicates the cache’s operating mode for spaces P0,
U0, and P3.
0: Write-back mode
1: Write-through mode
Indicates whether the cache function is used.
0: The cache function is not used.
1: The cache function is used.
Reserved
Cache Flush
Cache Enable
SH7720 Group, SH7721 Group
R01UH0083EJ0400 Rev. 4.00
Sep 21, 2010