参数资料
型号: R5F21216KFP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP48
封装: 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件页数: 16/45页
文件大小: 418K
代理商: R5F21216KFP
R8C/20 Group, R8C/21 Group
5. Electrical Characteristics
Rev.2.00 Aug 27, 2008
Page 23 of 41
REJ03B0120-0200
NOTES:
1.
VCC = 2.7 to 5.5 V at Topr = -40 to 85
°C (J version) / -40 to 125°C (K version), unless otherwise specified.
2.
Definition of programming/erasure endurance
The programming and erasure endurance is defined on a per-block basis.
If the programming and erasure endurance is n (n = 100 or 1,000), 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).
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 endurance can be reduced by writing to
sequential 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. 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.
5.
If error occurs during block erase, attempt to execute the clear status register command, then the block erase command at
least three times until the erase error does not occur.
6.
Customers desiring program/erase failure rate information should contact their Renesas technical support representative.
7.
The data hold time includes time that the power supply is off or the clock is not supplied.
Table 5.4
Flash Memory (Program ROM) Electrical Characteristics
Symbol
Parameter
Conditions
Standard
Unit
Min.
Typ.
Max.
Program/erase endurance(2)
R8C/20 Group
100(3)
times
R8C/21 Group
times
Byte program time
50
400
s
Block erase time
0.4
9
s
td(SR-SUS)
Time delay from suspend request until
erase suspend
97 + CPU clock
× 6 cycle
s
Interval from erase start/restart until
following suspend request
650
s
Interval from program start/restart until
following suspend request
0
ns
Time from suspend until program/erase
restart
3 + CPU clock
× 4 cycle
s
Program, erase voltage
2.7
5.5
V
Read voltage
2.7
5.5
V
Program, erase temperature
0
60
°C
Data hold time(7)
Ambient temperature = 55
°C20
year
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