HD6417727F100C Renesas Electronics America, HD6417727F100C Datasheet - Page 210
![IC SUPERH MPU ROMLESS 240QFP](/photos/28/62/286203/240-bfqfp__prqp0240kc-b_sml.jpg)
HD6417727F100C
Manufacturer Part Number
HD6417727F100C
Description
IC SUPERH MPU ROMLESS 240QFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.HD6417727BP100CV.pdf
(1098 pages)
Specifications of HD6417727F100C
Core Processor
SH-3 DSP
Core Size
32-Bit
Speed
100MHz
Connectivity
FIFO, SCI, SIO, SmartCard, USB
Peripherals
DMA, LCD, POR, WDT
Number Of I /o
104
Program Memory Type
ROMless
Ram Size
32K x 8
Voltage - Supply (vcc/vdd)
1.6 V ~ 2.05 V
Data Converters
A/D 6x10b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
240-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
HD6417727F100C
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Section 5 Cache
5.2.2
CCR2 register is used to enable or disable cache locking mechanism during DSP mode (CPU
status register bit 12) only. Executing a prefetch instruction (PREF) during DSP mode will bring
in one line size of data pointed by Rn to cache, according to the setting of CCR2 [9:8] (W3LOAD,
W3LOCK) and [1:0] (W2LOAD, W2LOCK):
When CCR2[9:8]=11, during DSP mode PREF @Rn will bring the data into way 3. When
CCR2[9:8]=00, 01 or 10 during DSP mode, or any setting during non-DSP mode, PREF @Rn will
place the data into the way pointed by LRU.
When CCR2[1:0]=11, during DSP mode PREF @Rn will bring the data into way 2. When
CCR2[1:0]=00, 01 or 10 during DSP mode, or any setting during non-DSP mode, PREF @Rn will
place the data into the way pointed by LRU.
CCR2 must be set before cache is enabled.
When a PREF instruction is issued and there is a cache hit, the operation is treated as NOP.
Figure 5.3 shows the configuration of the CCR2 register.
The CCR2 register is a write-only register. If read, an undefined value will be returned.
Rev.6.00 Mar. 27, 2009 Page 152 of 1036
REJ09B0254-0600
⎯:
CF:
WT:
CE:
CB:
31
Cache Control Register 2 (CCR2)
…
Reserved bits. These bits are always read as 0. The write value should always be 0.
Cache flush bit. Writing 1 flushes all cache entries (clears the V, U, and LRU bits of all
cache entries to 0). Always reads 0. Write-back to external memory is not performed when
the cache is flushed.
Write-through bit. Indicates the cache's operating mode for areas P0, U0 and P3.
1 = write-through mode, 0 = write-back mode.
Cache enable bit. Indicates whether the cache function is used.
1 = cache used, 0 = cache not used.
Cache write-back bit. Indicates the cache's operating mode for area P1.
1 = write-back mode, 0 = write-through mode.
…
…
Figure 5.2 CCR Register Configuration
…
…
…
…
…
6
5
4
CF
3
CB
2
WT
1
CE
0
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