HD64F3067RF20 Renesas Electronics America, HD64F3067RF20 Datasheet - Page 212

• Manufacturer Part Number: HD64F3067RF20
• Description: IC H8 MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3067RF20

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 20MHz
• 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): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-QFP
• Package: 100PQFP
• Family Name: H8
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 5 V
• Data Bus Width: 16|32 Bit
• Number Of Programmable I/os: 70
• Interface Type: SCI
• On-chip Adc: 8-chx10-bit
• On-chip Dac: 2-chx8-bit
• Number Of Timers: 7
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 6 Bus Controller
Example of Program Setup Procedure: Figure 6.34 shows an example of the program setup
procedure.
6.5.13
Note the following points when using the DRAM refresh function.
Rev. 4.00 Jan 26, 2006 page 188 of 938
REJ09B0276-0400
Refresh cycles will not be executed when the external bus released state, software standby
mode, or a bus cycle is extended by means of wait state insertion. Refreshing must therefore be
performed by other means in these cases.
If a refresh request is generated internally while the external bus is released, the first request is
retained and a single refresh cycle will be executed after the bus-released state is cleared.
Figure 6.35 shows the bus cycle in this case.
When a bus cycle is extended by means of wait state insertion, the first request is retained in
the same way as when the external bus has been released.
Usage Notes
Figure 6.34 Example of Setup Procedure when Using DRAM Interface
Set bits CKS2 to CKS0 in RTMCSR
Wait for DRAM stabilization time
DRAM can be accessed
Set ABWCR
Set RTCOR
Set DRCRB
Set DRCRA