MC908AZ32ACFU Freescale Semiconductor, MC908AZ32ACFU Datasheet - Page 247

• 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

Figure 23-7
When bit DDRBx is a logic 1, reading address $0001 reads the PTBx data latch. When bit DDRBx is a
logic 0, reading address $0001 reads the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit.
Freescale Semiconductor
shows the port B I/O logic.
X = don’t care
Hi-Z = high impedance
1. Writing affects data register, but does not affect input.
Avoid glitches on port B pins by writing to the port B data register before
changing data direction register B bits from 0 to 1.
DDRB
Bit
0
1
READ DDRB ($0005)
WRITE DDRB ($0005)
WRITE PTB ($0001)
READ PTB ($0001)
PTB
Bit
X
X
Table 23-2. Port B Pin Functions
RESET
MC68HC908AZ32A Data Sheet, Rev. 2
Figure 23-7. Port B I/O Circuit
Input, Hi-Z
I/O Pin
Output
Mode
Table 23-2
NOTE
DDRBx
PTBx
Accesses to
Read/Write
DDRB[7:0]
DDRB[7:0]
DDRB
summarizes the operation of the port B pins.
PTB[7:0]
Read
Pin
Accesses to PTB
PTB[7:0]
PTB[7:0]
Write
PTBx
(1)
Port B
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