UPD70F3451GC-UBT-A Renesas Electronics America, UPD70F3451GC-UBT-A Datasheet - Page 1018

• Manufacturer Part Number: UPD70F3451GC-UBT-A
• Description: MCU 32BIT 128KB FLASH 80LQFP
• Manufacturer: Renesas Electronics America
• Series: V850E/Ix3r

Specifications of UPD70F3451GC-UBT-A

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 64MHz
• Connectivity: CSI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 44
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3.5 V ~ 5.5 V
• Data Converters: A/D 10x12b, 4x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

20.5.2 Restore
address of the restored PC.
1016
Execution is restored from software exception processing by the RETI instruction.
When the RETI instruction is executed, the CPU performs the following processing, and transfers control to the
<1> Loads the restored PC and PSW from EIPC and EIPSW because the PSW.EP bit is 1.
<2> Transfers control to the address of the restored PC and PSW.
The processing of the RETI instruction is shown below.
Caution When the PSW.EP and PSW.NP bits are changed by the LDSR instruction during software
Remark
exception processing, in order to restore the PC and PSW correctly during restoring by the
RETI instruction, it is necessary to set the EP bit back to 1 and clear the NP bit to 0 using the
LDSR instruction immediately before the RETI instruction.
The solid line shows the CPU processing flow.
CHAPTER 20 INTERRUPT/EXCEPTION PROCESSING FUNCTION
Figure 20-9. RETI Instruction Processing
User’s Manual U18279EJ3V0UD