MC68HC705C9A Datasheet, PDF (49/118 Pages) Motorola, Inc – Microcontrollers

V_DD
V_DD
PORT B EXTERNAL INTERRUPT
MASK OPTION REGISTER CONTROLLED
DISABLED
ENABLED
READ $0005
WRITE $0005
RESET
DATA DIRECTION
REGISTER B
BIT DDRB7
WRITE $0001
PORT B DATA
REGISTER
PBX
BIT PB7
READ $0001
Port D
SOFTWARE OR MASK OPTION REGISTER
CONTROLLED DEPENDENT ON CONFIGURATION
EDGE AND LEVEL
EDGE ONLY
FROM OTHER
PORT B PINS
IRQ
V_DD
DQ
CQ
R
I BIT
(FROM CCR)
RESET
EXTERNAL INTERRUPT VECTOR FETCH
Figure 7-2. Port B I/O Logic
EXTERNAL
INTERRUPT
REQUEST
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
Freescale Semiconductor
49