UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 293

• 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: -

(7) Flash write buffer register (FLW)
(8) Protect byte
This register is used to store the data to be written to the flash memory.
This register is set with a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears these registers to 00H.
This protect byte is used to specify the area that is to be protected from writing or erasing. The specified area
is valid only in the self programming mode. Because self programming of the protected area is invalid, the data
written to the protected area is guaranteed.
Address: 0081H
PRSELF4
PD78F9232
Address: FFA8H
Symbol
7
1
0
0
0
0
0
0
0
0
1
FLW
PRSELF3
PRSELF4
FLW7
7
1
1
1
1
1
1
1
1
1
6
Figure 19-16. Format of Flash Write Buffer Register (FLW)
After reset: 00H
Other than above
FLW6
PRSELF2
PRSELF3
Figure 19-17. Format of Protect Byte (1/2)
6
0
0
0
0
1
1
1
1
1
5
CHAPTER 19 FLASH MEMORY
FLW5
User’s Manual U17446EJ5V0UD
5
PRSELF2
PRSELF1
R/W
0
0
1
1
0
0
1
1
1
4
FLW4
4
PRSELF0
PRSELF1
0
1
0
1
0
1
0
1
1
3
FLW3
3
Blocks 15 to 0 are protected.
Blocks 13 to 0 are protected.
Blocks 14 and 15 can be written or erased.
Blocks 11 to 0 are protected.
Blocks 12 to 15 can be written or erased.
Blocks 9 to 0 are protected.
Blocks 10 to 15 can be written or erased.
Blocks 7 to 0 are protected.
Blocks 8 to 15 can be written or erased.
Blocks 5 to 0 are protected.
Blocks 6 to 15 can be written or erased.
Blocks 3 to 0 are protected.
Blocks 4 to 15 can be written or erased.
Blocks 1 and 0 are protected.
Blocks 2 to 15 can be written or erased.
All blocks can be written or erased.
Setting prohibited
PRSELF0
FLW2
2
2
FLW1
1
Status
1
1
FLW0
0
0
1
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