M38039FFHFP#U0 Renesas Electronics America, M38039FFHFP#U0 Datasheet - Page 79

• Manufacturer Part Number: M38039FFHFP#U0
• Description: IC 740 MCU FLASH 60K 64QFP
• Manufacturer: Renesas Electronics America
• Series: 740/38000r

Specifications of M38039FFHFP#U0

• Core Processor: 740
• Core Size: 8-Bit
• Speed: 16.8MHz
• Connectivity: SIO, UART/USART
• Peripherals: PWM, WDT
• Number Of I /o: 56
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 16x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

3803 Group (Spec.H)
Rev.3.11
REJ03B0017-0311
Functions To Inhibit Rewriting Flash Memory Version
To prevent the contents of internal flash memory from being read
out or rewritten easily, this MCU incorporates a ROM code
protect function for use in parallel I/O mode and an ID code
check function for use in standard serial I/O mode.
• ROM Code Protect Function
The ROM code protect function is the function to inhibit reading
out or modifying the contents of internal flash memory by using
the ROM code protect control address (address FFDB
parallel I/O mode. Figure.72 shows the ROM code protect
control address (address FFDB
User ROM area.)
Fig 72. Structure of ROM code protect control address
Apr 5, 2006
b7
Notes 1: When ROM code protect is turned on, the internal flash memory is protected
2: When ROM code protect level 2 is turned on, ROM code readout by a
3: The ROM code protect reset bits can be used to turn off ROM code protect
against readout or modification in parallel I/O mode.
shipment inspection LSI tester, etc. also is inhibited.
level 1 and ROM code protect level 2. However, since these bits cannot be
modified in parallel I/O mode, they need to be rewritten in serial I/O mode or
CPU rewrite mode.
16
Page 77 of 113
). (This address exists in the
1
b0
1
ROM code protect control address (address FFDB
ROMCP (FF
Reserved bits (“1” at read/write)
ROM code protect level 2 set bits (ROMCP2)
ROM code protect reset bits (ROMCR)
ROM code protect level 1 set bits (ROMCP1)
b3b2
0 0: Protect enabled
0 1: Protect enabled
1 0: Protect enabled
1 1: Protect disabled
b5b4
0 0: Protect removed
0 1: Protect set bits effective
1 0: Protect set bits effective
1 1: Protect set bits effective
b7b6
0 0: Protect enabled
0 1: Protect enabled
1 0: Protect enabled
1 1: Protect disabled
16
) in
16
If one or both of the pair of ROM code protect bits is set to “0”,
the ROM code protect is turned on, so that the contents of
internal flash memory are protected against readout and
modification. The ROM code protect is implemented in two
levels. If level 2 is selected, the flash memory is protected even
against readout by a shipment inspection LSI tester, etc. When an
attempt is made to select both level 1 and level 2, level 2 is
selected by default.
If both of the two ROM code protect reset bits are set to “00”, the
ROM code protect is turned off, so that the contents of internal
flash memory can be readout or modified. Once the ROM code
protect is turned on, the contents of the ROM code protect reset
bits cannot be modified in parallel I/O mode. Use the serial I/O
or CPU rewrite mode to rewrite the contents of the ROM code
protect reset bits.
Rewriting of only the ROM code protect control address (address
FFDB
protect reset bit, rewrite the whole user ROM area (block 0)
containing the ROM code protect control address.
when shipped)
16
) cannot be performed. When rewriting the ROM code
(3)
(1, 2)
(1)
16
)