MC68HC908GT16CFB Freescale Semiconductor, MC68HC908GT16CFB Datasheet - Page 123

• Manufacturer Part Number: MC68HC908GT16CFB
• Description: IC MCU 16K FLASH 8MHZ SPI 44PQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908GT16CFB

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: LVD, POR, PWM
• Number Of I /o: 36
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Chapter 12
Input/Output (I/O) Ports (PORTS)
12.1 Introduction
Bidirectional input-output (I/O) pins form five parallel ports. All I/O pins are programmable as inputs or
outputs. All individual bits within port A, port C, and port D are software configurable with pullup devices
if configured as input port bits. The pullup devices are automatically and dynamically disabled when a port
bit is switched to output mode.
Freescale Semiconductor
$0000
$0001
$0002
$0003
$0004
$0005
Addr.
Data Direction Register A
Data Direction Register B
Register Name
Port C Data Register
Port D Data Register
Port A Data Register
Port B Data Register
Connect any unused I/O pins to an appropriate logic level, either V
V
termination reduces excess current consumption and the possibility of
electrostatic damage.
SS
See page 126.
See page 128.
See page 130.
See page 132.
See page 126.
See page 128.
. Although the I/O ports do not require termination for proper operation,
MC68HC908GT16 • MC68HC908GT8 • MC68HC08GT16 Data Sheet, Rev. 5.0
(DDRA)
(DDRB)
(PTC)
(PTD)
(PTA)
(PTB)
Reset:
Reset:
Reset:
Reset:
Reset:
Reset:
Read:
Read:
Read:
Read:
Read:
Read:
Write:
Write:
Write:
Write:
Write:
Write:
Figure 12-1. I/O Port Register Summary
DDRA7
DDRB7
PTA7
PTB7
PTD7
Bit 7
0
0
0
= Unimplemented
DDRA6
DDRB6
PTA6
PTB6
PTC6
PTD6
6
0
0
NOTE
DDRA5
DDRB5
PTA5
PTB5
PTC5
PTD5
5
0
0
DDRA4
DDRB4
Unaffected by reset
Unaffected by reset
Unaffected by reset
Unaffected by reset
PTA4
PTB4
PTC4
PTD4
4
0
0
DDRA3
DDRB3
PTA3
PTB3
PTC3
PTD3
3
0
0
DDRA2
DDRB2
PTC2
PTA2
PTB2
PTD2
2
0
0
DD
or
DDRA1
DDRB1
PTC1
PTD1
PTA1
PTB1
1
0
0
DDRA0
DDRB0
PTC0
PTD0
PTA0
PTB0
Bit 0
0
0
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