UPD70F3738GF-GAS-AX Renesas Electronics America, UPD70F3738GF-GAS-AX Datasheet - Page 924

• Manufacturer Part Number: UPD70F3738GF-GAS-AX
• Description: MCU 32BIT V850ES/JX3-L 100-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3-Lr

Specifications of UPD70F3738GF-GAS-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 84
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 2.2 V ~ 3.6 V
• Data Converters: A/D 12x10b; 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: -

30.5.2 Features
922
(1) Secure self programming (boot swap function)
(2) Interrupt support
The V850ES/JG3-L supports a boot swap function that can be used to exchange the physical memory of
blocks 0 to 15 with the physical memory of blocks 16 to 31. By writing the start program to be rewritten to
blocks 16 to 31 in advance and then swapping the physical memory, the entire area can be safely rewritten
even if a power failure occurs during rewriting because the correct user program always exists in blocks 0 to
15.
Instructions cannot be fetched from the flash memory during self-programming. Consequently, a user handler
written to the flash memory cannot be used even if an interrupt has occurred.
Therefore, to use an interrupt during self-programming in the V850ES/JG3-L, execution must jump to a specific
address
address
Note NMI interrupt: Start address of internal RAM
Caution To execute INTKR interrupt servicing during self programming, set the interrupt mask flag to
Last block
Block 32
Block 31
Block 17
Block 16
Block 15
Block 1
Block 0
Maskable interrupt: Start address of internal RAM + 4 addresses
Note
Note
:
:
:
disable interrupts (KRIC.KRMK bit = 1) and poll the interrupt request flag (KRIC.KRIF flag).
Setting the KRIC.KRMK bit to 0 (to enable interrupts) during self programming is prohibited.
For details of interrupt servicing, see 21.3.4 Interrupt control register (xxICn).
in the internal RAM. Write a branch instruction to execute the user interrupt servicing at the specific
in the internal RAM.
Figure 30-17. Rewriting Entire Memory Area (Boot Swap)
Rewriting blocks
16 to 31
CHAPTER 30 FLASH MEMORY
User’s Manual U18953EJ5V0UD
Last block
Block 32
Block 31
Block 17
Block 16
Block 15
Block 1
Block 0
:
:
:
Boot swap
Last block
Block 32
Block 31
Block 17
Block 16
Block 15
Block 1
Block 0
:
:
: