MC908AS60ACFN Freescale Semiconductor, MC908AS60ACFN Datasheet - Page 250
MC908AS60ACFN
Manufacturer Part Number
MC908AS60ACFN
Description
IC MCU 60K FLASH 8.4MHZ 52PLCC
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908AZ60ACFUER.pdf
(414 pages)
Specifications of MC908AS60ACFN
Core Processor
HC08
Core Size
8-Bit
Speed
8.4MHz
Connectivity
CAN, SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
42
Program Memory Size
60KB (60K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K 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
52-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Input/Output Ports
22.2 Port A
Port A is an 8-bit general-purpose bidirectional I/O port.
22.2.1 Port A Data Register
The port A data register contains a data latch for each of the eight port A pins.
PTA[7:0] — Port A Data Bits
22.2.2 Data Direction Register A
Data direction register A determines whether each port A pin is an input or an output. Writing a logic 1 to
a DDRA bit enables the output buffer for the corresponding port A pin; a logic 0 disables the output buffer.
DDRA[7:0] — Data Direction Register A Bits
Figure 22-4
250
These read/write bits are software programmable. Data direction of each port A pin is under the control
of the corresponding bit in data direction register A. Reset has no effect on port A data.
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
shows the port A I/O logic.
Address:
Address:
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.
Reset:
Reset:
Read:
Read:
Write:
Write:
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
DDRA7
$0000
$0004
PTA7
Bit 7
Bit 7
0
Figure 22-3. Data Direction Register A (DDRA)
Figure 22-2. Port A Data Register (PTA)
DDRA6
PTA6
6
6
0
DDRA5
PTA5
5
5
0
NOTE
DDRA4
Unaffected by Reset
PTA4
4
4
0
DDRA3
PTA3
3
3
0
DDRA2
PTA2
2
2
0
DDRA1
PTA1
1
1
0
Freescale Semiconductor
DDRA0
PTA0
Bit 0
Bit 0
0
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