UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 284

• Manufacturer Part Number: UPD78F9234MC-5A4-A
• Description: MCU 8BIT 8KB FLASH 30PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9234MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

19.8 Flash Memory Programming by Self Programming
program, making it possible to upgrade programs in the field.
19.8.1 Outline of self programming
self programming mode. Write/erase processing for the flash memory, which has been set to the register in advance,
is performed by executing the HALT instruction during self programming mode. The HALT state is automatically
released when processing is completed.
Example of shifting normal mode to self programming mode for details.
diagram, Table 19-10 lists the commands for controlling self programming.
282
Table 19-8 shows the relationship between the security setting and the operation in each programming mode.
The 78K0S/KB1+ supports a self programming function that can be used to rewrite the flash memory via a user
Caution Self programming processing must be included in the program before performing self
Remarks 1. For usage of self programming, refer to the examples from 19.8.4 onward.
To execute self programming, shift the mode from the normal operation of the user program (normal mode) to the
To shift to the self programming mode, execute a specific sequence for a specific register. Refer to 19.8.4
Remark
Figure 19-8 shows a block diagram for self programming, Figure 19-9 shows the self programming state transition
Notes 1. Execution of each command is prohibited by the security setting.
Security Setting
Batch erase (chip erase)
Block erase
Write
Table 19-8. Relationship Between Security Setting and Operation In Each Programming Mode
Note Maskable interrupt servicing is disabled during self programming mode.
Normal mode
Self programming mode
2. Execution of self programming command is possible regardless of the security setting.
2. To use the internal flash memory of the 78K0S/KB1+ as the external EEPROM for storing data, refer
programming.
Data written by self programming can be referenced with the MOV instruction.
to 78K0S/Kx1+ EEPROM Emulation Application Note (U17379E).
Programming Mode
Mode
Possible
Security Setting
Table 19-9. Self Programming Mode
On-Board/Off-Board Programming
CHAPTER 19 FLASH MEMORY
User’s Manual U17446EJ5V0UD
User Program Execution
Enabled
Enabled
Valid
Security Operation
Note
Note 1
Execution of Write/erase for Flash
Impossible
Memory with HALT Instruction
Security Setting
Self Programming
Enabled
Invalid
Security Operation
Note 2