HD6417708SF60V Renesas Electronics America, HD6417708SF60V Datasheet - Page 319

• Manufacturer Part Number: HD6417708SF60V
• Description: IC SUPERH MPU ROMLESS 208LQFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of HD6417708SF60V

• 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: 208-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Ram Size: -
• Program Memory Size: -
• Data Converters: -

10.4.4
In the SH7708 Series (SH7708, SH7708S, SH7708R), if an SDRAM auto-refresh (CAS-before-
RAS) request occurs during an area 6 PCMCIA area access, CS6 is simultaneously asserted, in
addition to the CS signal for the area to be accessed, when the auto-refresh is performed.
If the following specifications are made, CS3 and CS6 will be asserted simultaneously:
Area 3: SDRAM
Area 6: PCMCIA
CS6 remains asserted until the end of the following PCMCIA bus cycle.
Restrictions: When using PCMCIA in area 6 and also using SDRAM, the area 6 CS signal (CS6)
may be asserted earlier than usual, at the same time as the preceding auto-refresh cycle.
Remedy: This anomaly occurs only in area 6. There is no problem with area 5.
Therefore, if use of both SDRAM and PCMCIA in the system is being considered, area 5 should
be used.
If area 6 is used, the system design should allow for CS to be asserted early without causing any
problems.
CKIO
CS3
RAS
BS
CS6
PCMCIA Area Access
Auto-refresh
cycle
CS (CS3) asserted
in CAS-before-RAS
refresh
PCMCIA area CS
(CS6) asserted
PCMCIA cycle
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