DF3052BX25V Renesas Electronics America, DF3052BX25V Datasheet - Page 257

• 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: -

8.4.8
Figure 8.13 shows an example of the timing of the basic DMAC bus cycle. This example shows a
word-size transfer from a 16-bit two-state access area to an 8-bit three-state access area. When the
DMAC gets the bus from the CPU, after one dead cycle (Td), it reads from the source address and
writes to the destination address. During these read and write operations the bus is not released
even if there is another bus request. DMAC cycles comply with bus controller settings in the same
way as CPU cycles.
Address
bus
RD
HWR
LWR
DMAC Bus Cycle
T
1
CPU cycle
T
2
Figure 8.13 DMA Transfer Bus Timing (Example)
T
1
T
2
T
d
T
Source
address
1
DMAC cycle (word transfer)
T
2
T
1
T
Destination address
2
Rev. 3.00 Mar 21, 2006 page 227 of 814
T
3
T
1
T
2
Section 8 DMA Controller
T
3
T
1
REJ09B0302-0300
T
CPU cycle
2
T
1
T
2