ATmega88PA Automotive Atmel Corporation, ATmega88PA Automotive Datasheet - Page 69

• Manufacturer Part Number: ATmega88PA Automotive
• Manufacturer: Atmel Corporation

7701E–AVR–02/11
• Port B, Bit 3 – RESET/dW/PCINT11
RESET: External Reset input is active low and enabled by un-programming ("1") the RST-
DISBL fuse. Pull-up is activated and output driver and digital input are deactivated when the
pin is used as the RESET pin.
dW: When the debugWIRE enable (DWEN) fuse is programmed and lock bits are un-pro-
grammed, 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.
PCINT11: Pin change interrupt source 11. The PB3 pin can serve as an external interrupt
source for pin change interrupt 1.
Table 12-8 on page 69
the overriding signals shown in
Table 12-8.
1.
2.
Signal
Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
PTOE
DIEOE
DIEOV
DI
AIO
RSTDISBL is 1 when the Fuse is “0” (Programmed).
DebugWIRE is enabled when DWEN fuse is programmed and lock bits are un-programmed.
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)
+ DEBUGWIRE_ENABLE
+ DEBUGWIRE_ENABLE
+ DEBUGWIRE_ENABLE
+ DEBUGWIRE_ENABLE
and
Atmel ATtiny24/44/84 [Preliminary]
Table 12-9 on page 70
Figure 12-5 on page
(2)
(2)
• debugWire
+ (RSTDISBL
(2)
(2)
(2)
(2)
(1)
relate the alternate functions of Port B to
62.
PB2/INT0/OC0A/CKOUT/PCINT10
CKOUT
0
CKOUT
1'b1
CKOUT + OC0A enable
CKOUT • System Clock + CKOUT • OC0A
0
PCINT10 • PCIE1 + INT0
PCINT10 • PCIE1 + INT0
INT0/PCINT10 Input
69