HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 514

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 16 RAM
16.3
Operation
When the RAME bit is set to 1, the on-chip RAM is enabled. Accesses to the addresses shown in
table 16.1 are directed to the on-chip RAM. In modes 1 to 5 (expanded modes), when the RAME
bit is cleared to 0, the off-chip address space is accessed. In mode 6, 7 (single-chip mode), when
the RAME bit is cleared to 0, the on-chip RAM is not accessed: read access always results in H'FF
data, and write access is ignored.
Since the on-chip RAM is connected to the CPU by an internal 16-bit data bus, it can be written
and read by word access. It can also be written and read by byte access. Byte data is accessed in
two states using the upper 8 bits of the data bus. Word data starting at an even address is accessed
in two states using all 16 bits of the data bus.
Rev. 2.00 Sep 20, 2005 page 474 of 800
REJ09B0260-0200