UPD78F1174AGF-GAT-AX Renesas Electronics America, UPD78F1174AGF-GAT-AX Datasheet - Page 640

• Manufacturer Part Number: UPD78F1174AGF-GAT-AX
• Description: MCU 16BIT 78K0R/KX3 128-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1174AGF-GAT-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, EBI/EMI, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

16.4 Operation of DMA Controller
16.4.1 Operation procedure
638
<1> The DMA controller is enabled to operate when DENn = 1. Before writing the other registers, be sure to set
<2> Set an SFR address, a RAM address, the number of times of transfer, and a transfer mode of DMA transfer
<3> The DMA controller waits for a DMA trigger when DSTn = 1. Use 81H to write with an 8-bit manipulation
<4> When a software trigger (STGn) or a start source trigger specified by IFCn3 to IFCn0 is input, a DMA transfer
<5> Transfer is completed when the number of times of transfer set by the DBCn register reaches 0, and transfer
<6> Stop the operation of the DMA controller by clearing DENn to 0 when the DMA controller is not used.
Remark
DENn to 1. Use 80H to write with an 8-bit manipulation instruction.
to the DSAn, DRAn, CBCn, and DMCn registers.
instruction.
is started.
is automatically terminated by occurrence of an interrupt (INTDMAn).
n: DMA channel number (n = 0, 1)
Setting DSAn, DRAn, DBCn, and DMCn
Figure 16-6. Operation Procedure
Receiving DMA acknowledge
DRAn = DRAn + 1 (or + 2)
Transmitting DMA request
CHAPTER 16 DMA CONTROLLER
DBCn = DBCn − 1
DMA trigger = 1?
DBCn = 0000H ?
User’s Manual U18432EJ5V0UD
INTDMAn = 1
DMA transfer
DENn = 1
DENn = 0
DSTn = 1
DSTn = 0
Yes
Yes
No
No
Set by software program
Operation by DMA
controller (hardware)
Set by software program