Table 46 r, Attiny26(l) – Rainbow Electronics ATtiny26L User Manual
Page 104
104
ATtiny26(L)
1477B–AVR–04/02
Notes:
1. Enabling of the Timer/Counter1 Compare match outputs and Timer/Counter1 PWM Outputs OC1A/OC1B and OC1A/OC1B
are described in the section “8-bit Timer/Counter1” on page 47.
2. Note that the PCINT0 Interrupt is only enabled if both the Global Interrupt Flag is enabled, the PCIE0 flag in GIMSK is set
and the alternate function of the pin is disabled as described in “Pin Change Interrupt” on page 38.
3. The Two-wire and Three-wire USI-modes are described in “Universal Serial Interface – USI” on page 63.
4. Shift clock (SCL) hold for USI is in described “Universal Serial Interface – USI” on page 63.
5. USI start up interrupt is enabled if both the Global Interrupt Flag is enabled and the USISIE flag in the USICR Register is set
as described in “Universal Serial Interface – USI” on page 63.
6. Data Output (DO) is valid in USI Three-wire mode and the operation is described in “Universal Serial Interface – USI” on
7. Operation of the data pin SDA in USI Two-wire mode and DI in USI Three-wire mode in “Universal Serial Interface – USI” on
8. Not operator is marked with “~”.
Table 46. Overriding Signals for Alternate Functions in PB3..PB0
Signal Name
PB3/OC1B/PCINT0
PB2/SCK/SCL/OC1B/PCI
NT0
PB1/DO/OC1A/PCINT0
PB0/DI/SDA/OC1A
PUOE
0
USI_TWO-WIRE
0
USI_TWO-WIRE
PUOV
0
0
0
0
DDOE
0
USI_TWO-WIRE
0
USI_TWO-WIRE
DDOV
0
(USI_SCL_HOLD
PORTB2) • DDB2
0
(~SDA | ~PORTB0) •
DDB0
PVOE
OC1B_ENABLE
USI_TWO-WIRE
DDB2 | OC1B_ENABLE
USI_THREE-WIRE
OC1A_ENABLE
USI_TWO-WIRE
• DDB0
|
OC1A_ENABLE
PVOV
OC1B
~(USI_TWO-WIRE •
DDB2) • OC1B
USI_THREE-WIRE
DO
| ~USI_THREE-
WIRE • OC1A_ENABLE
• OC1A
~(USI_TWO-WIRE•
DDB0) •
OC1A_ENABLE
DIEOE
PCINT0_ENABLE
•
~OC1B_ENABLE
~(USI_TWO-WIRE |
USI_THREE-WIRE |
OC1B_ENABLE) •
PCINT0_ENABLE
|
USI_START_I.ENABLE
~(USI_THREE-WIRE |
OC1A_ENABLE) •
PCINT0_ENABLE
~(USI_TWO-WIRE
|
USI_THREE-WIRE
OC1A_ENABLE
) •
PCINT0_ENABLE
USI_START_I.ENABLE
DIEOV
1
1
1
1
DI
PCINT0
PCINT0, SCL, SCK
PCINT0
PCINT0, SDA
AIO
–
–
–
–