HD6417708SF60 Renesas Electronics America, HD6417708SF60 Datasheet - Page 123
![IC SUPERH MPU ROMLESS 144LQFP](/photos/28/61/286126/144-lqfp__plqp0144kb-a_sml.jpg)
HD6417708SF60
Manufacturer Part Number
HD6417708SF60
Description
IC SUPERH MPU ROMLESS 144LQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.HD6417708SF60V.pdf
(635 pages)
Specifications of HD6417708SF60
Core Processor
SH-2
Core Size
32-Bit
Speed
60MHz
Connectivity
EBI/EMI, SCI, SmartCard
Peripherals
POR, WDT
Number Of I /o
8
Program Memory Type
ROMless
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
144-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Ram Size
-
Program Memory Size
-
Data Converters
-
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5.3.5
Use software to ensure coherency between the cache and the external memory. When memory
shared by the SH7708 Series and another device is accessed, the latest data may be in a write-back
mode cache, so invalidate the entry that includes the latest data in the cache, generate a write back,
and update the data in memory before using it. When the caching area is updated by a device other
than the SH7708 Series, invalidate the entry that includes the updated data in the cache.
5.3.6
In RAM mode, way 0 and way 1 function as a 4-kbyte two-way set associative cache, while way 2
and way 3 function as 4-kbyte internal RAM. The internal RAM is mapped onto H'7F000000 to
H'7F000FFF with 4-kbyte shadow areas from H'7F001000 to H'7FFFFFFF. In RAM mode with
the MMU enabled, a virtual address from H'7F00000 to H'7FFFFFFF is not translated to an
external physical address. The internal RAM can be accessed in both privileged and user mode by
setting its address as source or destination address in the instructions. Before changing the RA bit
in the CCR register to change the cache operation mode, all entries in the cache should be
invalidated.
5.4
To allow software management of the cache, it is mapped onto virtual address space P4. The
address array is mapped onto addresses H'F0000000 to H'F0FFFFFF and the data array onto
addresses H'F1000000 to H'F1FFFFFF. In privileged mode, the cache contents can be read or
written using the MOV instruction. With the address array and data array, the access size is fixed
at longword, and instruction fetches cannot be performed.
5.4.1
The address array is mapped onto H'F0000000 to H'F0FFFFFF. To access an address array, the
32-bit address field (for read/write accesses) and 32-bit data field (for write accesses) must be
specified. The address field specifies information for selecting the entry to be accessed; the data
field specifies the address, V bit, U bit, and LRU bits to be written to the address array (figure
5.5 (1)).
Coherency of Cache and External Memory
RAM Mode
Memory-Mapped Cache
Address Array
Longword 0–3:
PA (31–4)
PA (31–4):
Figure 5.4 Write-Back Buffer Configuration
Longword 0 Longword 1 Longword 2 Longword 3
Physical address written to external memory
The line of cache data to be written to
external memory
103
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