HD6417708RF100A Renesas Electronics America, HD6417708RF100A Datasheet - Page 303
HD6417708RF100A
Manufacturer Part Number
HD6417708RF100A
Description
IC SUPERH MPU ROMLESS 144LQFP
Manufacturer
Renesas Electronics America
Series
SuperH® SH7700r
Datasheet
1.HD6417708SF60V.pdf
(635 pages)
Specifications of HD6417708RF100A
Core Processor
SH-2
Core Size
32-Bit
Speed
100MHz
Connectivity
EBI/EMI, SCI, SmartCard
Peripherals
POR, WDT
Number Of I /o
8
Program Memory Type
ROMless
Voltage - Supply (vcc/vdd)
3.15 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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10.3.8
PCMCIA Interface
In the SH7708 Series, setting the A5PCM bit in BCR1 to 1 makes the bus interface for physical
space area 5 an IC memory card interface as stipulated in JEIDA version 4.2 (PCMCIA2.1).
Setting the A6PCM bit to 1 makes the bus interface for physical space area 6 an IC memory card
and I/O card interface as stipulated in JEIDA version 4.2. When the IC memory card interface is
selected, a BCR1 register setting enables page mode burst access mode to be used. This burst
access mode is not stipulated in JEIDA version 4.2, but allows high-speed data access using ROM
provided with a burst mode, etc.
When the PCMCIA interface is used, a bus size of 8 or 16 bits can be set by bits A5SZ1 and
A5SZ0, or A6SZ1 and A6SZ0, in BCR2.
Figure 10.41 shows an example of PCMCIA card connection to the SH7708 Series. To enable
active insertion of the PCMCIA cards (i.e. insertion or removal while system power is being
supplied), a 3-state buffer must be connected between the SH7708 Series’s bus interface and the
PCMCIA cards.
As operation in big-endian mode is not explicitly stipulated in the JEIDA/PCMCIA specifications,
the PCMCIA interface for the SH7708 Series in big-endian mode is stipulated independently.
If PCMCIA is used in area 6, synchronous DRAM is used at the same time, and a synchronous
DRAM auto-refresh (CAS-before-RAS refresh) request is issued simultaneously, area 6 card
enable signals CS6 and CE2B may be asserted earlier than usual, at the same time as the
immediately preceding auto-refresh cycle. When both PCMCIA and synchronous DRAM are
used, they should be used in area 5. When area 5 is used, the system design should provide for CS
to be asserted early without causing any problems.
283
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