UPD70F3747GB-GAH-AX Renesas Electronics America, UPD70F3747GB-GAH-AX Datasheet - Page 834

• 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: -

18.2.2 Restore
832
(1) From NMI pin input
Caution When the EP and NP bits are changed by the LDSR instruction during non-maskable interrupt
Remark
Execution is restored from the NMI servicing by the RETI instruction.
When the RETI instruction is executed, the CPU performs the following processing, and transfers control to the
address of the restored PC.
<1> Loads the restored PC and PSW from FEPC and FEPSW, respectively, because the PSW.EP bit is 0 and
<2> Transfers control back to the address of the restored PC and PSW.
Figure 18-3 illustrates how the RETI instruction is processed.
the PSW.NP bit is 1.
servicing, 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 0 and the NP bit back to 1 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 18-3. RETI Instruction Processing
PSW.EP
PSW.NP
0
0
EIPC
EIPSW
User’s Manual U18854EJ2V0UD
1
PC
PSW
FEPC
FEPSW