PARAMETER |
TEST CONDITIONS |
MIN |
TYP |
MAX |
UNIT |
Program Time(3) |
8K Sector |
|
|
250 |
2000(2) |
ms |
4K Sector |
|
|
125 |
2000(2) |
ms |
16-Bit Word |
|
|
50 |
|
μs |
Erase Time(1) |
8K Sector |
|
|
2 |
12(2) |
s |
4K Sector |
|
|
2 |
12(2) |
s |
IDDP(4) |
VDD current consumption during
Erase/Program cycle |
VREG disabled |
|
80 |
|
mA |
IDDIOP(4) |
VDDIO current consumption during
Erase/Program cycle |
|
60 |
|
IDDIOP(4) |
VDDIO current consumption during
Erase/Program cycle |
VREG enabled |
|
120 |
|
mA |
(1) The on-chip flash memory is in an erased state when the device
is shipped from TI. As such, erasing the flash memory is not required prior to
programming, when programming the device for the first time. However, the erase
operation is needed on all subsequent programming operations.
(2) Maximum flash parameter mentioned are for the first 100 program
and erase cycles.
(3) Program time is at the maximum device frequency. The
programming time indicated in this table is applicable only when all the
required code/data is available in the device RAM, ready for programming.
Program time includes overhead of the flash state machine but does not include
the time to transfer the following into RAM:
- the code that uses flash
API to program the flash
- the Flash API itself
- Flash data to be
programmed
(4) Typical parameters as seen at room temperature including
function call overhead, with all peripherals off. It is important to maintain a
stable power supply during the entire flash programming process. It is
conceivable that device current consumption during flash programming could be
higher than normal operating conditions. The power supply used should ensure
VMIN on the supply rails at all times, as specified in the
Recommended Operating Conditions of the data sheet. Any brown-out or
interruption to power during erasing/programming could potentially corrupt the
password locations and lock the device permanently. Powering a target board
(during flash programming) through the USB port is not recommended, as the port
may be unable to respond to the power demands placed during the programming
process.