User Manual
544
ATmega48A/PA/88A/PA/168A/PA/328/P [DATASHEET]
8271E–AVR–07/2012
36. Datasheet Revision History
Please note that the referring page numbers in this section are referred to this document. The referring revision in
this section are referring to the document revision.
36.1 Rev. 8271E – 07/2012
36.2 Rev. 8271D – 05/11
36.3 Rev. 8271C – 08/10
1. Updated Figure 1-1 on page 2. Overlined “RESET” in 28 MLF top view and in 32 MLF top view.
2. Added EEAR9 bit to the ”EEARH and EEARL – The EEPROM Address Register” on page 21 and
updated the all bit descriptions accordingly.
3. Added a footnote “EEAR9 and EEAR8 are unused bits in ATmega 48A/48PA and must always be
written to zero” to ”EEARH and EEARL – The EEPROM Address Register” on page 21.
4. Updated Table 18-8 on page 157, “Waveform Generation Mode Bit Description” . WGM2, WGM1
and WGM0 changed to WGM22, WGM21 and WGM20 respectively.
5. Updated ”TCCR2B – Timer/Counter Control Register B” on page 158. bit 2 (CS22) and bit 3
(WGM22) changed from R (read only) to R/W (read/write).
6. Updated the definition of fosc on page 174. fosc is the system clock frequency (not XTAL pin
frequency)
7. Updated ”SPMCSR – Store Program Memory Control and Status Register” on page 267. Bit 0
renamed SPMEN and added bit 5 “SIGRD”.
8. Replaced “SELFPRGEN” by “SPMEN” throughout the whole datasheet including in the “code
examples”, except in ”Program And Data Memory Lock Bits” on page 285 and in ”Fuse Bits” on
page 286.
9. Updated ”Register Summary” on page 518 to include the bits: SIGRD and SPMEN in the
SMPCSR register.
10. Updated the Table 29-1 on page 303. Removed the footnote.
11. Updated the footnote of the Table 29-14 on page 311. Removed the footnote “Note 2”.
12. Updated ”Errata” on page 538. Added “Errata” TWI Data setup time can be too short
1. Added Atmel QTouch Sensing Capablity Feature
2. Updated ”Register Description” on page 92 with PINxn as R/W.
3. Added a footnote to the PINxn, page 92.
4. Updated “Ordering Information”,”ATmega328” on page 531. Added “ATmega328-
MMH” and “ATmega328-MMHR”.
5. Updated “Ordering Information”,”ATmega328P” on page 532. Added “ATmega328P-
MMH” and “ATmega328P-MMHR”.
6. Added “Ordering Information” for ATmega48PA/88PA/168PA/328P @ 105C
7. Updated ”Errata ATmega328” on page 541 and ”Errata ATmega328P” on page 542
8. Updated the datasheet according to the Atmel new brand style guide.
1. Added 32UFBGA Pinout, Table 1-1 on page 3.