UPD78F1211MC-GAA-AX Renesas Electronics America, UPD78F1211MC-GAA-AX Datasheet - Page 973
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UPD78F1211MC-GAA-AX
Manufacturer Part Number
UPD78F1211MC-GAA-AX
Description
MCU 16BIT 78K0R/LX3 38-SSOP
Manufacturer
Renesas Electronics America
Series
78K0R/Ix3r
Datasheet
1.UPD78F1201MC-CAB-AX.pdf
(1067 pages)
Specifications of UPD78F1211MC-GAA-AX
Core Processor
78K/0R
Core Size
16-Bit
Speed
40MHz
Connectivity
3-Wire SIO, I²C, LIN, UART/USART
Peripherals
DMA, LVD, POR, PWM, WDT
Number Of I /o
27
Program Memory Size
16KB (16K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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24.8.1 Boot swap function
overwriting is disabled due to data destruction in the boot area.
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 78K0R/Ix3, 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.
X X X X X H
In an example of above figure, it is as follows.
0 1 0 0 0 H
0 0 0 0 0 H
0 2 0 0 0 H
If rewriting the boot area failed by temporary power failure or other reasons, restarting a program by resetting or
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
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: Boot program area before boot swap
Boot cluster 1: Boot program area after boot swap
(boot cluster 0)
User program
Boot program
User program
Boot
Self-programming
to boot cluster 1
Note
, which is a boot program area, by self-programming, write a new boot program to
New boot program
(boot cluster 1)
(boot cluster 0)
User program
Boot program
Figure 24-16. Boot Swap Function
CHAPTER 24 FLASH MEMORY
User’s Manual U19678EJ1V1UD
Boot
Execution of boot
swap by firmware
New boot program
(boot cluster 0)
(boot cluster 1)
User program
Boot program
Boot
Self-programming
to boot cluster 0
New user program
New boot program
(boot cluster 0)
(boot cluster 1)
User program
971
Boot
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