MC68HC908KX8 Datasheet, PDF (34/310 Pages) Motorola, Inc – Microcontrollers

General Description
MCU
V_DD
V_SS
C_Bypass
0.1 µF
+
C_Bulk
9_''
Note: Component values shown represent typical applications.
Figure 1-3. Power Supply Bypassing
1.5.3 External Interrupt Pin (IRQ1)
IRQ1 is an asynchronous external interrupt pin with an internal pullup
resistor. See Section 12. External Interrupt (IRQ).
1.5.4 Port A Input/Output (I/O) Pins (PTA4/KBD4–PTA0/KBD0)
PTA4/KBD4–PTA0/KBD0 is a 5-bit special-function port that shares its
pins with the keyboard interrupt (KBI) module and the 2-channel timer
module (TIM).
• Any or all of the port A pins can be programmed to serve as
keyboard interrupt pins. The respective pin utilizes an internal
pullup resistor when enabled. See Section 13. Keyboard
Interrupt Module (KBI).
• Each port A pin contains a software selectable internal pullup
resistor when the general-function I/O port is configured as an
input. See Section 10. Input/Output (I/O) Ports. The pullup
resistor is automatically disabled once a TIM special function is
enabled for that pin.
• All port A pins are high-current source/sink pins.
Technical Data
34
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 — Rev. 1.0
General Description
MOTOROLA