HD64F3048VTF8 Renesas Electronics America, HD64F3048VTF8 Datasheet - Page 185

• Manufacturer Part Number: HD64F3048VTF8
• Description: IC H8 MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3048VTF8

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 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: -
• Other names: HD64F3048VX8

7.1
The H8/3048 Group has an on-chip refresh controller that enables direct connection of 16-bit-wide
DRAM or pseudo-static RAM (PSRAM).
DRAM or pseudo-static RAM can be directly connected to area 3 of the external address space.
A maximum 128 kbytes can be connected in modes 1, 2, and 5 (1-Mbyte modes). A maximum
2 Mbytes can be connected in modes 3, 4, and 6 (16-Mbyte modes).
Systems that do not need to refresh DRAM or pseudo-static RAM can use the refresh controller as
an 8-bit interval timer.
When the refresh controller is not used, it can be independently halted to conserve power. For
details see section 21.6, Module Standby Function.
7.1.1
The refresh controller can be used for one of three functions: DRAM refresh control, pseudo-static
RAM refresh control, or 8-bit interval timing. Features of the refresh controller are listed below.
Features as a DRAM Refresh Controller
Features as a Pseudo-Static RAM Refresh Controller
Enables direct connection of 16-bit-wide DRAM
Selection of 2CAS or 2WE mode
Selection of 8-bit or 9-bit column address multiplexing for DRAM address input
Examples:
CAS-before-RAS refresh control
Software-selectable refresh interval
Software-selectable self-refresh mode
Wait states can be inserted
1-Mbit DRAM: 8-bit row address
4-Mbit DRAM: 9-bit row address
4-Mbit DRAM: 10-bit row address
Features
Overview
Section 7 Refresh Controller
8-bit column address
9-bit column address
8-bit column address
Rev. 7.00 Sep 21, 2005 page 159 of 878
Section 7 Refresh Controller
REJ09B0259-0700