UPD70F3747GB-GAH-AX Renesas Electronics America, UPD70F3747GB-GAH-AX Datasheet - Page 853

• Manufacturer Part Number: UPD70F3747GB-GAH-AX
• Description: MCU 32BIT V850ES/HX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Hx3r

Specifications of UPD70F3747GB-GAH-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: CSI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 51
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3.7 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

18.4.2 Restore
PC’s address.
Restoration from software exception processing is carried out by the RETI instruction.
By executing the RETI instruction, the CPU carries out the following processing and shifts control to the restored
<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.
Figure 18-10 illustrates the processing of the RETI instruction.
Caution When the EP and NP bits are changed by the LDSR instruction during the software exception
Remark
processing, in order to restore the PC and PSW correctly during restoration by the RETI
instruction, it is necessary to set the EP bit back to 1 and the NP bit back to 0 using the LDSR
instruction immediately before the RETI instruction.
The solid line shows the CPU processing flow.
1
CHAPTER 18 INTERRUPT/EXCEPTION PROCESSING FUNCTION
Original processing restored
PC
PSW
RETI instruction
Figure 18-10. RETI Instruction Processing
PSW.NP
PSW.EP
0
0
EIPC
EIPSW
User’s Manual U18854EJ2V0UD
1
PC
PSW
FEPC
FEPSW
851