MC908AZ32ACFU Freescale Semiconductor, MC908AZ32ACFU Datasheet - Page 256

• Manufacturer Part Number: MC908AZ32ACFU
• Description: IC MCU 32K FLASH 8.4MHZ 64-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908AZ32ACFU

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: CAN, SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 40
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 15x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

I/O Ports
23.7.2 Data Direction Register F
Data direction register F determines whether each port F pin is an input or an output. Writing a logic 1 to
a DDRF bit enables the output buffer for the corresponding port F pin; a logic 0 disables the output buffer.
DDRF[6:0] — Data Direction Register F Bits
Figure 23-19
256
These read/write bits control port F data direction. Reset clears DDRF[6:0], configuring all port F pins
as inputs.
1 = Corresponding port F pin configured as output
0 = Corresponding port F pin configured as input
shows the port F I/O logic.
Address:
Avoid glitches on port F pins by writing to the port F data register before
changing data direction register F bits from 0 to 1.
Reset:
Read:
Write:
READ DDRF ($000D)
WRITE DDRF ($000D)
WRITE PTF ($0009)
READ PTF ($0009)
$000D
Bit 7
R
R
0
0
Figure 23-18. Data Direction Register F (DDRF)
= Reserved
DDRF6
6
0
RESET
MC68HC908AZ32A Data Sheet, Rev. 2
Figure 23-19. Port F I/O Circuit
DDRF5
5
0
NOTE
DDRF4
DDRFx
PTFx
4
0
DDRF3
3
0
DDRF2
2
0
DDRF1
1
0
Freescale Semiconductor
DDRF0
Bit 0
PTFx
0