r5f21346unfp Renesas Electronics Corporation., r5f21346unfp Datasheet - Page 42

• Manufacturer Part Number: r5f21346unfp
• Description: R8c/34u Group, R8c/34k Group Renesas Mcu
• Manufacturer: Renesas Electronics Corporation.

R8C/34U Group, R8C/34K Group
R01DS0113EJ0110 Rev.1.10
Jun 15, 2011
Figure 5.4
Table 5.7
Notes:
—
—
—
—
—
t
—
—
t
-READY)
—
—
—
—
d(SR-SUS)
d(CMDRST
Symbol
1. V
2. Definition of programming/erasure endurance
3. Endurance to guarantee all electrical characteristics after program and erase. (1 to Min. value can be guaranteed.)
4. In a system that executes multiple programming operations, the actual erasure count can be reduced by writing to sequential
5. If an error occurs during block erase, attempt to execute the clear status register command, then execute the block erase
6. Customers desiring program/erase failure rate information should contact their Renesas technical support representative.
7. − 40 ° C for D version.
8. The data hold time includes time that the power supply is off or the clock is not supplied.
The programming and erasure endurance is defined on a per-block basis.
If the programming and erasure endurance is n (n = 10,000), each block can be erased n times. For example, if 1,024 1-byte
writes are performed to different addresses in block A, a 1 Kbyte block, and then the block is erased, the
programming/erasure endurance still stands at one. However, the same address must not be programmed more than once
per erase operation (overwriting prohibited).
addresses in turn so that as much of the block as possible is used up before performing an erase operation. For example,
when programming groups of 16 bytes, the effective number of rewrites can be minimized by programming up to 128 groups
before erasing them all in one operation. In addition, averaging the erasure endurance between blocks A to D can further
reduce the actual erasure endurance. It is also advisable to retain data on the erasure endurance of each block and limit the
number of erase operations to a certain number.
command at least three times until the erase error does not occur.
CC
= 2.7 to 5.5 V and T
Program/erase endurance
Byte program time
(program/erase endurance ≤ 1,000 times)
Byte program time
(program/erase endurance > 1,000 times)
Block erase time
(program/erase endurance ≤ 1,000 times)
Block erase time
(program/erase endurance > 1,000 times)
Time delay from suspend request until
suspend
Interval from erase start/restart until
following suspend request
Time from suspend until erase restart
Time from when command is forcibly
stopped until reading is enabled
Program, erase voltage
Read voltage
Program, erase temperature
Data hold time
Time delay until Suspend
Flash Memory (Data flash Block A to Block D) Electrical Characteristics
Suspend request
FST6, FST7: Bit in FST register
FMR21: Bit in FMR2 register
(FMR21 bit)
(8)
FST7 bit
FST6 bit
Parameter
opr
= − 20 to 85 ° C (N version)/-40 to 85 ° C (D version), unless otherwise specified.
(2)
Ambient temperature = 55 ° C
Fixed time
Conditions
t
d(SR-SUS)
Clock-dependent
time
10,000
− 20
Min.
2.7
1.8
—
—
—
—
—
20
—
0
−
(7)
(3)
Access restart
Typ.
160
300
Standard
0.2
0.3
5. Electrical Characteristics
—
—
—
—
—
—
—
—
−
30 + CPU clock
30 + CPU clock
5 + CPU clock
× 3 cycles
× 1 cycle
× 1 cycle
Max.
1500
1500
5.5
5.5
85
—
—
—
1
1
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times
year
Unit
ms
µ s
µ s
µ s
µ s
µ s
° C
V
V
s
s