MC908AP32ACFBER Freescale Semiconductor, MC908AP32ACFBER Datasheet - Page 263

• Manufacturer Part Number: MC908AP32ACFBER
• Description: IC MCU 32K FLASH 8MHZ 44-QFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908AP32ACFBER

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, IRSCI, SCI, SPI
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFP
• Processor Series: HC08AP
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, DEMO908AP64E, M68CBL05CE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

SDA and SCL — Multi-Master IIC Data and Clock
TxD and RxD — SCI Transmit and Receive Data
T1CH0 and T1CH1 — Timer 1 Channel I/O
T2CH0 and T2CH1 — Timer 2 Channel I/O
16.3.2 Data Direction Register B (DDRB)
Data direction register B determines whether each port B pin is an input or an output. Writing a logic 1 to
a DDRB bit enables the output buffer for the corresponding port B pin; a logic 0 disables the output buffer.
DDRB[7:0] — Data Direction Register B Bits
Figure 16-8
Freescale Semiconductor
The SDA and SCL pins are multi-master IIC data and clock pins. Setting the MMEN bit in the MMIIC
control register 1 (MMCR1) configures the PTB0/SDA and PTB1/SCL pins for MMIIC function and
overrides any control from the port I/O logic.
The TxD and RxD pins are SCI transmit and receive data pins. Setting the ENSCI bit in the SCI control
register 1 (SCC1) configures the PTB2/TxD and PTB3/RxD pins for SCI function and overrides any
control from the port I/O logic.
The T1CH0 and T1CH1 pins are the TIM1 input capture/output compare pins. The edge/level select
bits, ELSxB:ELSxA, determine whether the PTB4/T1CH0–PTB5/T1CH1 pins are timer channel I/O
pins or general-purpose I/O pins.
The T2CH0 and T2CH1 pins are the TIM2 input capture/output compare pins. The edge/level select
bits, ELSxB:ELSxA, determine whether the PTB6/T2CH0–PTB7/T2CH1 pins are timer channel I/O
pins or general-purpose I/O pins.
These read/write bits control port B data direction. Reset clears DDRB[7:0], configuring all port B pins
as inputs.
1 = Corresponding port B pin configured as output
0 = Corresponding port B pin configured as input
shows the port B I/O logic.
Address:
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.
Reset:
Read:
Write:
DDRB7
$0005
Bit 7
0
Figure 16-7. Data Direction Register B (DDRB)
DDRB6
MC68HC908AP A-Family Data Sheet, Rev. 3
6
0
DDRB5
5
0
NOTE
DDRB4
4
0
DDRB3
3
0
DDRB2
2
0
DDRB1
1
0
DDRB0
Bit 0
0
Port B
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