UPD78F0386GK-8EU-A Renesas Electronics America, UPD78F0386GK-8EU-A Datasheet - Page 565

• Manufacturer Part Number: UPD78F0386GK-8EU-A
• Description: MCU 96KB FLASH 5KB RAM
• Manufacturer: Renesas Electronics America
• Series: 78K0/Lx2r

Specifications of UPD78F0386GK-8EU-A

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LCD, LVD, POR, PWM, WDT
• Number Of I /o: 26
• Program Memory Size: 96KB (96K x 8)
• Program Memory Type: FLASH
• Ram Size: 5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

26.9.1 Boot swap function
in the boot area may be lost and the program may not be restarted by resetting.
boot cluster 1 in advance. When the program has been correctly written to boot cluster 1, swap this boot cluster 1 and
boot cluster 0 by using the set information function of the firmware of the 78K0/LF2, so that boot cluster 1 is used as a
boot area. After that, erase or write the original boot program area, boot cluster 0.
executed correctly because it is booted from boot cluster 1 to be swapped when the program is reset and started next.
information function of the firmware of the 78K0/LF2.
If rewriting the boot area has failed during self-programming due to a power failure or some other cause, the data
The boot swap function is used to avoid this problem.
Before erasing boot cluster 0
As a result, even if a power failure occurs while the boot programming area is being rewritten, the program is
If the program has been correctly written to boot cluster 0, restore the original boot area by using the set
Note A boot cluster is a 4 KB area and boot clusters 0 and 1 are swapped by the boot swap function.
Boot cluster 0 (0000H to 0FFFH): Original boot program area
Boot cluster 1 (1000H to 1FFFH): Area subject to boot swap function
X X X X H
1 0 0 0 H
0 0 0 0 H
2 0 0 0 H
(boot cluster 0)
User program
Boot program
User program
Boot
Note
Self-programming
to boot cluster 1
Self-programming
to boot cluster 0
, which is a boot program area, by self-programming, write a new boot program to
Figure 26-19. Boot Swap Function
CHAPTER 26 FLASH MEMORY
X X X X H
1 0 0 0 H
0 0 0 0 H
2 0 0 0 H
User’s Manual U17504EJ2V0UD
New boot program
New boot program
New boot program
(boot cluster 1)
(boot cluster 0)
(boot cluster 1)
(boot cluster 0)
User program
Boot program
User program
Boot
Boot
Execution of boot
swap by firmware
Execution of boot
swap by firmware
New boot program
New boot program
New boot program
(boot cluster 1)
(boot cluster 0)
(boot cluster 1)
(boot cluster 0)
User program
Boot program
User program
Boot
Boot
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