D13002X16V Renesas Electronics America, D13002X16V Datasheet - Page 245

• Manufacturer Part Number: D13002X16V
• Description: MCU 3/5V 0K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of D13002X16V

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: SCI
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 38
• Program Memory Type: ROMless
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• 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: -
• Program Memory Size: -

8.4.10 External Bus Requests, Refresh Controller, and DMAC
During a DMA transfer, if the bus right is requested by an external bus request signal (BREQ) or
by the refresh controller, the DMAC releases the bus after completing the transfer of the current
byte or word. If there is a transfer request at this point, the DMAC requests the bus right again.
Figure 8-20 shows an example of the timing of insertion of a refresh cycle during a burst transfer
on channel 0.
ø
Address
bus
RD
HWR LWR
,
T
1
Figure 8-20 Bus Timing of Refresh Controller and DMAC
T
2
DMAC cycle (channel 0)
T
1
T
2
T
1
T
2
T
1
229
T
2
T
Refresh
cycle
1
T
2
T
d
T
DMAC cycle (channel 0)
1
T
2
T
1
T
2
T
1
T
2