DF61654N50FTV Renesas Electronics America, DF61654N50FTV Datasheet - Page 324

• Manufacturer Part Number: DF61654N50FTV
• Description: IC H8SX/1654 MCU FLASH 120TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8SX/1600r

Specifications of DF61654N50FTV

• Core Processor: H8SX
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, IrDA, SCI, SmartCard, USB
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 75
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 120-TQFP, 120-VQFP
• For Use With: HS0005KCU11H - EMULATOR E10A-USB H8S(X),SH2(A)3DK1657 - DEV EVAL KIT FOR H8SX/1657
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Section 7 DMA Controller (DMAC)
When a transfer starts, the transfer source address is added to the offset every time data is
transferred. The transfer data is written to the destination continuous addresses. When data 4 is
transferred meaning that the repeat size of transfers is completed, the transfer source address
returns to the transfer start address (address of data 1 on the transfer source) and a repeat size end
interrupt is requested. While this interrupt stops the transfer temporarily, the contents of DSAR are
written to the address of data 5 by the CPU (when the data access size is longword, write the data
1 address + 4). When the DTE bit in DMDR is set to 1, the transfer is resumed from the state when
the transfer is stopped. Accordingly, operations are repeated and the transfer source data is
transposed to the destination area (XY conversion).
Rev.1.00 Sep. 08, 2005 Page 274 of 966
REJ09B0219-0100
Figure 7.20 XY Conversion Flowchart Using Offset Addition in Repeat Transfer Mode
Figure 7.20 shows a flowchart of the XY conversion.
Set address and transfer count
Enable repeat escape interrupt
Decrements transfer count
and repeat size
Receives transfer request
Set repeat transfer mode
: User operation
Transfer count = 0?
Set DTE bit to 1
Transfers data
Start
End
Yes
No
: DMAC operation
Initializes transfer source address
Set transfer source address + 4
Generates repeat size end
Repeat size = 0?
interrupt request
Yes
(Longword transfer)
No