MC908AP32CFAE Freescale Semiconductor, MC908AP32CFAE Datasheet - Page 264

• Manufacturer Part Number: MC908AP32CFAE
• Description: IC MCU 32K FLASH 8MHZ 48-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908AP32CFAE

• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-LQFP
• Controller Family/series: HC08
• No. Of I/o's: 32
• Ram Memory Size: 2KB
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Embedded Interface Type: I2C, SCI, SPI
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Input/Output (I/O) Ports
DDRA[7:0] — Data Direction Register A Bits
Figure 16-4
When DDRAx is a logic 1, reading address $0000 reads the PTAx data latch. When DDRAx is a logic 0,
reading address $0000 reads the voltage level on the pin. The data latch can always be written,
regardless of the state of its data direction bit.
Table 16-2
262
These read/write bits control port A data direction. Reset clears DDRA[7:0], configuring all port A pins
as inputs.
1 = Corresponding port A pin configured as output
0 = Corresponding port A pin configured as input
summarizes the operation of the port A pins.
shows the port A I/O logic.
1. X = don’t care.
2. Hi-Z = high impedance.
3. Writing affects data register, but does not affect input.
DDRA
Avoid glitches on port A pins by writing to the port A data register before
changing data direction register A bits from 0 to 1.
Bit
0
1
READ DDRA ($0004)
WRITE DDRA ($0004)
WRITE PTA ($0000)
READ PTA ($0000)
PTA Bit
X
X
(1)
I/O Pin Mode
Input, Hi-Z
MC68HC908AP Family Data Sheet, Rev. 4
Table 16-2. Port A Pin Functions
RESET
Figure 16-4. Port A I/O Circuit
Output
(2)
Accesses to DDRA
NOTE
DDRAx
PTAx
Read/Write
DDRA[7:0]
DDRA[7:0]
PTA[7:0]
Read
Pin
Accesses to PTA
PTA[7:0]
PTA[7:0]
Write
Freescale Semiconductor
PTAx
(3)