This chapter will compare the biggest changes in electrical- and typical
characteristics. For the most up-to-date- and other numbers refer to the latest data
sheet of the device.
The latest data sheets can be found here:
Table 1. Parallel Programming Characteristics
| Symbol |
Parameter |
ATmega48/88/168 |
ATmega48PB/88PB/168PB |
Units |
| Min. |
Max. |
Min. |
Max. |
| tWLRH |
WR Low to
RDY/BSY High |
3.7 |
4.5 |
3.2 |
3.4 |
ms |
| tWLRH_CE |
WR Low to RDY/BSY High for Chip
Erase |
7.5 |
9 |
9.8 |
10.5 |
ms |
| tBVDV |
BS1 Valid to DATA valid |
0 |
250 |
0 |
350 |
ns |
| tOLDV |
OE Low to DATA Valid |
0 |
250 |
0 |
350 |
ns |
Table 2. Typical Wait Delay Before
Writing the Next Flash or EEPROM Location
| Symbol |
ATmega48/88/168 |
ATmega48PB/88PB/168PB |
Units |
| tWD_FLASH |
4.5 |
2.6 |
ms |
| tWD_EEPROM |
3.6 |
3.6 |
ms |
| tWD_ERASE |
9.0 |
10.5 |
ms |
| tWD_FUSE |
- |
4.5 |
ms |