UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 659

• Manufacturer Part Number: UPD78F0550MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0550MA-FAA-AX

• Package / Case: *
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 10MHz
• Number Of I /o: 12
• Core Processor: 78K/0
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Peripherals: LVD, POR, PWM, WDT
• Connectivity: I²C, LIN, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

25.6 Security Settings
internal flash memory, so that the program cannot be changed by an unauthorized person.
when the programming mode is set next.
setting when the flash memory is shipped.
programming. Each security setting can be used in combination.
security function is enabled.
The 78K0/Kx2-L microcontrollers support a security function that prohibits rewriting the user program written to the
The operations shown below can be performed using the Security Set command. The security setting is valid
The batch erase (chip erase), block erase, write commands, and rewriting boot cluster 0 are enabled by the default
All the security settings are cleared by executing the batch erase (chip erase) command.
Table 25-5 shows the relationship between the erase and write commands when the 78K0/Kx2-L microcontroller
Disabling batch erase (chip erase)
Execution of the block erase and batch erase (chip erase) commands for entire blocks in the flash memory is
prohibited by this setting during on-board/off-board programming. Once execution of the batch erase (chip
erase) command is prohibited, all of the prohibition settings (including prohibition of batch erase (chip erase)) can
no longer be cancelled.
Disabling block erase
Execution of the block erase command for a specific block in the flash memory is prohibited during on-board/off-
board programming. However, blocks can be erased by means of self programming.
Disabling write
Execution of the write and block erase commands for entire blocks in the flash memory is prohibited during on-
board/off-board programming. However, blocks can be written by means of self programming.
Disabling rewriting boot cluster 0
Execution of the block erase command and write command on boot cluster 0 (0000H to 0FFFH) in the flash
memory is prohibited by this setting. Execution of the batch erase (chip erase) command is also prohibited by
this setting.
Caution After the security setting for the batch erase is set, erasure cannot be performed for the device.
In addition, even if a write command is executed, data different from that which has already
been written to the flash memory cannot be written, because the erase command is disabled.
Preliminary User’s Manual U19111EJ2V1UD
CHAPTER 25 FLASH MEMORY
Security can be set by on-board/off-board programming and self
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