attiny24v ATMEL Corporation, attiny24v Datasheet - Page 66
attiny24v
Manufacturer Part Number
attiny24v
Description
8-bit Avr Microcontroller With 2/4/8k Bytes Insystem Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATTINY24V.pdf
(236 pages)
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66
ATtiny24/44/84
• Port B, Bit 3 – RESET/dW/PCINT11
Table 10-8 on page 66
overriding signals shown in
Table 10-8.
1.
2.
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
DIEOE
DIEOV
DI
AIO
• RESET: External Reset input is active low and enabled by unprogramming (“1”) the
• dW: When the debugWIRE Enable (DWEN) Fuse is programmed and Lock bits are
• PCINT11: Pin Change Interrupt source 11. The PB3 pin can serve as an external interrupt
RSTDISBL Fuse. Pullup is activated and output driver and digital input are deactivated when
the pin is used as the RESET pin.
unprogrammed, the debugWIRE system within the target device is activated. The RESET
port pin is configured as a wire-AND (open-drain) bi-directional I/O pin with pull-up enabled
and becomes the communication gateway between target and emulator.
source for pin change interrupt 1.
RSTDISBL is 1 when the Fuse is “0” (Programmed).
DebugWIRE is enabled wheb DWEN Fuse is programmed and Lock bits are unprogrammed.
PB3/
PCINT11
RSTDISBL
1
RSTDISBL
DEBUGWIRE_ENABLE
Transmit
RSTDISBL
0
0
RSTDISBL
PCINT11 • PCIE1
DEBUGWIRE_ENABLE
PCINT11 • PCIE1)
dW/PCINT11 Input
Overriding Signals for Alternate Functions in PB3..PB2
RESET/dW/
(1)
(1)
(1)
(1)
and
+ DEBUGWIRE_ENABLE
+ DEBUGWIRE_ENABLE
+ DEBUGWIRE_ENABLE
+ DEBUGWIRE_ENABLE
Figure 10-5 on page
Table 10-9 on page 67
(2)
(2)
+ (RSTDISBL
• debugWire
(2)
(2)
(2)
(2)
(1)
59.
+
•
relate the alternate functions of Port B to the
PB2/INT0/OC0A/CKOUT/PCINT10
CKOUT
0
CKOUT
1
CKOUT + OC0A enable
CKOUT • System Clock + CKOUT • OC0A
0
PCINT10 • PCIE1 + INT0
PCINT10 • PCIE1 + INT0
INT0/PCINT10 Input
8006H–AVR–10/09
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