MC68HC705C8ACFN Freescale Semiconductor, MC68HC705C8ACFN Datasheet - Page 83

• Manufacturer Part Number: MC68HC705C8ACFN
• Description: IC MCU 4MHZ 8K OTP 44-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705C8ACFN

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: OTP
• Ram Size: 304 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

7.4.3 Port B Logic
MC68HC705C8A — Rev. 3
MOTOROLA
RESET
EXTERNAL INTERRUPT VECTOR FETCH
FROM OTHER
PORT B PINS
IRQ
WRITE $0005
WRITE $0001
READ $0005
READ $0001
FROM OPTION
RESET
REGISTER
Figure 7-6
Freescale Semiconductor, Inc.
IRQ
For More Information On This Product,
DATA DIRECTION
Figure 7-6. Port B I/O Logic
PORT B DATA
REGISTER B
REGISTER
BIT DDRB7
shows the port B I/O logic.
BIT PB7
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Parallel Input/Output (I/O)
FROM MOR1
V
DD
PBPU7
D
C
LATCH
IRQ
R
Q
Q
FROM CCR
I BIT
V
DD
Parallel Input/Output (I/O)
PB7
INTERRUPT
EXTERNAL
REQUEST
Technical Data
Port B
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