MC9S08GB60A Datasheet, PDF (84/302 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Chapter 6 Parallel Input/Output
Port A can be configured to be keyboard interrupt input pins. Refer to Chapter 9, “Keyboard Interrupt
(S08KBIV1),” for more information about using port A pins as keyboard interrupts pins.
6.3.2 Port B and Analog to Digital Converter Inputs
j
Port B
Bit 7
6
5
4
3
2
MCU Pin:
PTB7/
AD1P7
PTB6/ PTB5/ PTB4/ PTB3/
AD1P6 AD1P5 AD1P4 AD1P3
Figure 6-3. Port B Pin Names
PTB2/
AD1P2
1
PTB1/
AD1P1
Bit 0
PTB0/
AD1P0
Port B is an 8-bit port shared among the ATD inputs and general-purpose I/O. Any pin enabled as an ATD
input will be forced to act as an input.
Port B pins are available as general-purpose I/O pins controlled by the port B data (PTBD), data direction
(PTBDD), pullup enable (PTBPE), and slew rate control (PTBSE) registers. Refer to Section 6.4, “Parallel
I/O Controls,” for more information about general-purpose I/O control.
When the ATD module is enabled, analog pin enables are used to specify which pins on port B will be used
as ATD inputs. Refer to Chapter 14, “Analog-to-Digital Converter (S08ATDV3),” for more information
about using port B pins as ATD pins.
6.3.3 Port C and SCI2, IIC, and High-Current Drivers
Port C
Bit 7
MCU Pin: PTC7
6
5
3
3
PTC6
PTC5
PTC4
PTC3/
SCL1
Figure 6-4. Port C Pin Names
2
PTC2/
SDA1
1
PTC1/
RxD2
Bit 0
PTC0/
TxD2
Port C is an 8-bit port which is shared among the SCI2 and IIC1 modules, and general-purpose I/O. When
SCI2 or IIC1 modules are enabled, the pin direction will be controlled by the module or function. Port C
has high current output drivers.
Port C pins are available as general-purpose I/O pins controlled by the port C data (PTCD), data direction
(PTCDD), pullup enable (PTCPE), and slew rate control (PTCSE) registers. Refer to Section 6.4, “Parallel
I/O Controls,” for more information about general-purpose I/O control.
When the SCI2 module is enabled, PTC0 serves as the SCI2 module’s transmit pin (TxD2) and PTC1
serves as the receive pin (RxD2). Refer to Chapter 11, “Serial Communications Interface (S08SCIV1),”
for more information about using PTC0 and PTC1 as SCI pins
When the IIC module is enabled, PTC2 serves as the IIC modules’s serial data input/output pin (SDA1)
and PTC3 serves as the clock pin (SCL1). Refer to Chapter 13, “Inter-Integrated Circuit (S08IICV1),” for
more information about using PTC2 and PTC3 as IIC pins.
MC9S08GB60A Data Sheet, Rev. 2
84
Freescale Semiconductor