UPD70F3744GJ-GAE-AX Renesas Electronics America, UPD70F3744GJ-GAE-AX Datasheet - Page 776

• Manufacturer Part Number: UPD70F3744GJ-GAE-AX
• Description: MCU 32BIT V850ES/JX3 144-LQFP
• Manufacturer: Renesas Electronics America
• Series: V850ES/Jx3r

Specifications of UPD70F3744GJ-GAE-AX

• Core Processor: RISC
• Core Size: 32-Bit
• Speed: 32MHz
• Connectivity: CSI, EBI/EMI, I²C, UART/USART
• Peripherals: DMA, LVD, PWM, WDT
• Number Of I /o: 128
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 3.6 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: -

V850ES/JJ3
27.5.2 Features
R01UH0016EJ0400 Rev.4.00
Sep 30, 2010
(1) Secure self programming (boot swap function)
(2) Interrupt support
The V850ES/JJ3 supports a boot swap function that can 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. Conventionally, a user handler
written to the flash memory could not be used even if an interrupt occurred.
Therefore, in the V850ES/JJ3, to use an interrupt during self programming, processing transits to the specific
address
at the specific address
Note NMI interrupt:
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
:
:
:
in the internal RAM. Allocate the jump instruction that transits processing to the user interrupt servicing
Note
Figure 27-16. Rewriting Entire Memory Area (Boot Swap)
Rewriting blocks
in the internal RAM.
16 to 31
Start address of internal RAM
Last block
Block 32
Block 31
Block 17
Block 16
Block 15
Block 1
Block 0
:
:
:
Boot swap
CHAPTER 27 FLASH MEMORY
Last block
Block 32
Block 31
Block 17
Block 16
Block 15
Block 1
Block 0
:
:
:
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