D6417729RHF200BV Renesas Electronics America, D6417729RHF200BV Datasheet - Page 192

IC SUPER H MPU ROMLESS 208QFP

D6417729RHF200BV

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

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
-

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Address Array: The V bit indicates whether the entry data is valid. When the V bit is 1, data is
valid; when 0, data is not valid. The U bit indicates whether the entry has been written to in write-
back mode. When the U bit is 1, the entry has been written to; when 0, it has not. The address tag
holds the physical address used in the external memory access. It is composed of 22 bits (address
bits 31–10) used for comparison during cache searches.
In the SH7729R, the top three of 32 physical address bits are used as shadow bits (see section 11,
Bus State Controller (BSC)), and therefore in a normal replace operation the top three bits of the
tag address are cleared to 0.
The V and U bits are initialized to 0 by a power-on reset, but are not initialized by a manual reset.
The tag address is not initialized by either a power-on or manual reset.
Data Array: Holds a 16-byte instruction or data. Entries are registered in the cache in line units
(16 bytes). The data array is not initialized by a power-on or manual reset.
LRU: With the 4-way set associative system, up to four instructions or data with the same entry
address (address bits 11–4) 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.
In normal operation, four ways are used as cache and six LRU bits indicate the way to be replaced
(table 5.2). If a bit pattern other than those listed in table 5.2 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 5.2.
The LRU bits are initialized to 0 by a power-on reset, but are not initialized by a manual reset.
Rev. 5.0, 09/03, page 144 of 806
Entry 255
Entry 0
Entry 1
.
.
.
.
.
.
24 (1 + 1 + 22) bits
V U Tag address
Address array (ways 0−3)
Figure 5.1 Cache Structure
255
0
1
.
.
.
.
.
.
LW0
LW0−LW3: Longword data 0−3
128 (32 × 4) bits
LW1
LW2
Data array (ways 0−3)
LW3
255
0
1
.
.
.
.
.
.
LRU
6 bits

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