S128 Datasheet, PDF (93/107 Pages) Renesas Technology Corp – Microcontroller

S128
2.13 Flash Memory Characteristics
2.13.1 Code Flash Memory Characteristics
2. Electrical Characteristics
Table 2.59 Code flash characteristics (1)
Parameter
Reprogramming/erasure cycle*¹
Data hold time
After 1000 times N_PEC
Symbol
N_PEC
t_DRP
Min
1000
20*^2, *³
Typ
Max
Unit
Conditions
-
-
Times
-
-
-
Year
T_a = +85°C
Note 1. The reprogram/erase cycle is the number of erasures for each block. When the reprogram/erase cycle is n times
(n = 1,000), erasing can be performed n times for each block. For instance, when 4-byte programming is
performed 256 times for different addresses in 1-KB blocks, and then the entire block is erased, the reprogram/
erase cycle is counted as one. However, programming the same address for several times as one erasure is not
enabled. (overwriting is prohibited.)
Note 2. Characteristic when using the flash memory programmer and the self-programming library provided by Renesas
Electronics.
Note 3. This result is obtained from reliability testing.
Table 2.60 Code flash characteristics (2)
High-speed operating mode
Conditions: VCC = AVCC0 = 2.7 to 5.5 V
ICLK = 1 MHz
ICLK = 32 MHz
Parameter
Symbol Min
Typ
Max
Min
Typ
Max
Unit
Programming time
4 bytes
t_P4
-
Erasure time
1 KB
t_E1K
-
Blank check time
4 bytes
t_BC4
-
1 KB
t_BC1K
-
Erase suspended time
t_SED
-
Startup area switching setting time
t_SAS
-
Access window time
t_AWS
-
OCD/serial programmer ID setting time t_OSIS
-
Flash memory mode transition wait
t_DIS
2
time 1
Flash memory mode transition wait
t_MS
5
time 2
116
9.03
-
-
-
21.9
21.9
21.9
-
-
998
-
287
-
56.8
-
1899
-
22.5
-
585
-
585
-
585
-
-
2
-
5
54
506
μs
5.67
222
ms
-
16.6
μs
-
140
μs
-
10.7
μs
12.1
447
ms
12.1
447
ms
12.1
447
ms
-
-
μs
-
-
μs
Note 1. Does not include the time until each operation of the flash memory is started after instructions are executed by
the software.
Note 2. The lower-limit frequency of ICLK is 1 MHz during programming or erasing the flash memory. When using ICLK
at below 4 MHz, the frequency can be set to 1 MHz, 2 MHz, or 3 MHz. A non-integer frequency such as 1.5 MHz
cannot be set.
Note 3. The frequency accuracy of ICLK must be ±3.5% during programming or erasing the flash memory. Confirm the
frequency accuracy of the clock source.
R01DS0309EU0100 Rev.1.00
Mar 10, 2017
Page 93 of 107