M30803FGFP#U5 Renesas Electronics America, M30803FGFP#U5 Datasheet - Page 296
M30803FGFP#U5
Manufacturer Part Number
M30803FGFP#U5
Description
MCU 3/5V 256K PB-FREE 100-QFP
Manufacturer
Renesas Electronics America
Series
M16C™ M16C/80r
Datasheet
1.M30803FGGPU3.pdf
(360 pages)
Specifications of M30803FGFP#U5
Core Processor
M16C/80
Core Size
16-Bit
Speed
20MHz
Connectivity
SIO, UART/USART
Peripherals
DMA, PWM, WDT
Number Of I /o
85
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
20K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 10x10b, D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 85°C
Package / Case
100-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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M
R
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e
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1
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J
6
Figure 30.6 Lock bit program flowchart
1 .
0
C
9
0 .
8 /
B
0
0
Erase All Unlock Blocks Command (A7
Lock Bit Program Command (77
0
1
A
By writing the command code “A7
in the second bus cycle that follows, the system starts erasing blocks successively.
Whether the erase all unlock blocks command is terminated can be confirmed by reading the status
register or the flash memory control register 0, in the same way as for block erase. Also, the status
register can be read out to know the result of the auto erase operation.
When the lock bit disable bit of the flash memory control register 0 = 1, all blocks are erased no matter
how the lock bit is set. On the other hand, when the lock bit disable bit = 0, the function of the lock bit
is effective and only nonlocked blocks (where lock bit data = 1) are erased.
By writing the command code “77
in the second bus cycle that follows to the block address of a flash memory block, the system sets the
lock bit for the specified block to 0 (locked).
Figure 30.6 shows an example of a lock bit program flowchart. The status of the lock bit (lock bit data)
can be read out by a read lock bit status command.
Whether the lock bit program command is terminated can be confirmed by reading the status register
or the flash memory control register 0, in the same way as for page program.
For details about the function of the lock bit and how to reset the lock bit, refer to the section where the
data protect function is detailed.
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5
Page 283
f o
3
RY/BY status flag
2
9
Lock bit program
block address
Write 77
Write D0
SR4 = 0?
completed
16
16
16
Start
= 1?
/D0
” in the first bus cycle and the confirmation command code “D0
” in the first bus cycle and the confirmation command code “D0
YES
YES
16
16
16
16
)
/D0
NO
16
)
NO
Lock bit program in
error
30. CPU Rewrite Mode
16
16
”
”
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