DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 213

• Manufacturer Part Number: DF3052BX25V
• Description: MCU 5V 512K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of DF3052BX25V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K 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-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

If a bus cycle is prolonged by insertion of wait states, the first refresh request is held, as in the bus-
released state.
If there is contention with a bus request from an external bus master when making a transition to
software standby mode, a one-state bus-released state may occur immediately before the transition
to software standby mode (see figure 7.25).
When using software standby mode, clear the BRLE bit to 0 in BRCR before executing the
SLEEP instruction.
When making a transition to self-refresh mode, the strobe waveform output may not be guaranteed
due to the same kind of contention. This, too, can be prevented by clearing the BRLE bit to 0 in
BRCR.
RFSH
Refresh
request
BACK
Bus-released state
Figure 7.24 Refresh Cycles when Bus Is Released
Refresh cycle
Rev. 3.00 Mar 21, 2006 page 183 of 814
CPU cycle
Section 7 Refresh Controller
Refresh cycle
REJ09B0302-0300