ATtiny44 datasheet(226/236 Pages) ATMEL

226 / 236 page

226

8006H–AVR–10/09

ATtiny24/44/84

27. Datasheet Revision History

27.1

Rev H. 10/09

Updated document template. Re-arranged some sections.

Updated “Low-Frequency Crystal Oscillator” with the Table 6-8 on page 28

Updated Tables:

– “Active Clock Domains and Wake-up Sources in Different Sleep Modes” on page 33

– “DC Characteristics” on page 174

– “Register Summary” on page 213

Updated Register Description:

– “ADMUX – ADC Multiplexer Selection Register” on page 145

Signature Imprint Reading Instructions updated in “Reading Device Signature Imprint

Table from Firmware” on page 156.

Updated Section:

– Step 1. on page 164

Added Table:

– “Analog Comparator Characteristics” on page 179

Updated Figure:

– “Active Supply Current vs. frequency (1 - 20 MHz)” on page 187

Updated Figure 21-30 on page 201 and Figure 21-33 on page 202 under “Pin Thresh-

old and Hysteresis”.

10. Changed ATtiny24/44 device status to “Not Recommended for New Designs. Use:

ATtiny24A/44A”.

27.2

Rev G. 01/08

Updated sections:

– “Features” on page 1

– “RESET” on page 3

– “Overview” on page 4

– “About” on page 6

– “SPH and SPL — Stack Pointer Register” on page 11

– “Atomic Byte Programming” on page 17

– “Write” on page 17

– “Clock Sources” on page 25

– “Default Clock Source” on page 30

– “Sleep Modes” on page 33

– “Software BOD Disable” on page 34

– “External Interrupts” on page 49

– “USIBR – USI Data Buffer” on page 125

– “USIDR – USI Data Register” on page 124

– “DIDR0 – Digital Input Disable Register 0” on page 131

– “Features” on page 132

ATtiny44 Datasheet(PDF) 226 Page - ATMEL Corporation

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