Datasheet

226
8006H–AVR–10/09
ATtiny24/44/84
27. Datasheet Revision History
27.1 Rev H. 10/09
1. Updated document template. Re-arranged some sections.
2. Updated “Low-Frequency Crystal Oscillator” with the Table 6-8 on page 28
3. 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
4. Updated Register Description:
– “ADMUX – ADC Multiplexer Selection Register” on page 145
5. Signature Imprint Reading Instructions updated in “Reading Device Signature Imprint
Table from Firmware” on page 156.
6. Updated Section:
– Step 1. on page 164
7. Added Table:
– “Analog Comparator Characteristics” on page 179
8. Updated Figure:
– “Active Supply Current vs. frequency (1 - 20 MHz)” on page 187
9. 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
1. 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