HD64F7051SFJ20V Renesas Electronics America, HD64F7051SFJ20V Datasheet - Page 662

• Manufacturer Part Number: HD64F7051SFJ20V
• Description: MCU 5V 256K J-TEMP PB-FREE QFP-1
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7050r

Specifications of HD64F7051SFJ20V

• Core Processor: SH-2
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: EBI/EMI, SCI
• Peripherals: DMA, WDT
• Number Of I /o: 102
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 168-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 20 RAM
20.2
Operation
The on-chip RAM is controlled by means of the system control register (SYSCR).
When the RAME bit in SYSCR is set to 1, the on-chip RAM is enabled. Accesses to addresses
H'FFFFE800–H'FFFFFFFF (SH7050) and H'FFFFD800–H'FFFFFFFF (SH7051) are then directed
to the on-chip RAM.
When the RAME bit in SYSCR is cleared to 0, the on-chip RAM is not accessed. A read will
return an undefined value, and a write is invalid. If a transition is made to hardware standby mode
after the RAME bit in SYSCR is cleared to 0, the contents of the on-chip RAM are held.
For details of SYSCR, see 21.2.2, System Control Register (SYSCR), in section 21, Power-Down
State.
Rev. 5.00 Jan 06, 2006 page 640 of 818
REJ09B0273-0500