r5f21346ykfp Renesas Electronics Corporation., r5f21346ykfp Datasheet - Page 48

• Manufacturer Part Number: r5f21346ykfp
• Description: R8c/34w Group, R8c/34x Group, R8c/34y Group, R8c/34z Group Renesas Mcu
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/34W Group, R8C/34X Group, R8C/34Y Group, R8C/34Z Group
REJ03B0312-0010 Rev.0.10
Apr 09, 2010
Table 5.5
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. The data hold time includes time that the power supply is off or the clock is not supplied.
8. This data hold time includes 3,000 hours in Ta = 125°C and 7,000 hours in Ta = 85°C.
specified.
The programming and erasure endurance is defined on a per-block basis.
If the programming and erasure endurance is n (n = 100, 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).
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.
command at least three times until the erase error does not occur.
CC
Program/erase endurance
Byte program time
(program/erase endurance ≤ 1,000 times)
Byte program time
(program/erase endurance > 1,000 times)
Word program time
(program/erase endurance ≤ 1,000 times)
Word program time
(program/erase endurance > 1,000 times)
Block erase time
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
terminated until reading is enabled
Program, erase voltage
Read voltage
Program, erase temperature
Data hold time
= 2.7 to 5.5 V at T
Preliminary document
Specifications in this document are tentative and subject to change.
Flash Memory (Program ROM) Electrical Characteristics
(7)
Parameter
opr
= −40 to 85°C (J version) / −40 to 125°C (K version) (under consideration), unless otherwise
(2)
R8C/34X, R8C/34Z Group
R8C/34W, R8C/34Y Group
Ambient temperature = 55°C
Conditions
(8)
1,000
100
Min.
−40
2.7
2.7
20
−
−
−
−
−
−
0
−
−
(3)
(3)
Typ.
100
100
0.3
60
60
Standard
−
−
−
−
−
−
−
−
−
−
30+CPU clock ×
30+CPU clock ×
5+CPU clock ×
125 (K version)
85 (J version)
5. Electrical Characteristics
3 cycles
1 cycle
1 cycle
Max.
300
500
400
650
5.5
5.5
−
−
4
−
−
Page 48 of 67
times
times
year
Unit
ms
µs
µs
µs
µs
µs
µs
µs
°C
V
V
s