MC68HC908AT32 Datasheet, PDF (31/378 Pages) Freescale Semiconductor, Inc – Microcontrollers

Pin Assignments
1.4.12 Port E I/O Pins (PTE7/SPSCK–PTE0/TxD)
Port E is an 8-bit special function port that shares two of its pins with the timer interface module (TIMA),
four of its pins with the serial peripheral interface module (SPI), and two of its pins with the serial
communication interface module (SCI). See Chapter 16 Serial Communications Interface Module (SCI),
Chapter 17 Serial Peripheral Interface Module (SPI), Chapter 18 Timer Interface (TIMA-4) or Chapter 25
Timer Interface (TIM-6), and Chapter 22 MC68HC08AZ32 Emulator Input/Output Ports or Chapter 27
MC68HC08AS20 Emulator Input/Output Ports depending on the configuration.
1.4.13 Port F I/O Pins (PTF6–PTF0/TACH2)
Port F is a 7-bit special function port that shares its pins with the timer interface module (TIMB) if the part
is configured as MC68HC08AZ32 emulator protocol. If the part is configured as MC68HC08AS20
emulator protocol, four of its pins will be shared with the timer interface module (TIMA-6). See Chapter
18 Timer Interface (TIMA-4) or Chapter 25 Timer Interface (TIM-6), Chapter 19 Timer Interface (TIMB),
and Chapter 22 MC68HC08AZ32 Emulator Input/Output Ports or Chapter 27 MC68HC08AS20 Emulator
Input/Output Ports depending on the configuration.
NOTE
PTF4–PTF6 is available only in 64-pin packages.
1.4.14 Port G I/O Pins (PTG2/KBD2–PTG0/KBD0)
NOTE
This port is available only in the MC68HC08AZ32 emulator.
Port G is a 3-bit special function port that shares all of its pins with the keyboard interrupt module (KBD)
only if the part is configured as MC68HC08AZ32 emulator (64-pin QFP) protocol. If port G is available
and MC68HC08AS20 emulation is selected, this port will be general I/O only. See Chapter 24 Keyboard
Interrupt Module (KBD) and Chapter 22 MC68HC08AZ32 Emulator Input/Output Ports.
1.4.15 Port H I/O Pins (PTH1/KBD4–PTH0/KBD3)
NOTE
This port is available only in the MC68HC08AZ32 emulator.
Port H is a 2-bit special-function port that shares all of its pins with the keyboard interrupt module (KBD)
only if the part is configured as MC68HC08AZ32 emulator protocol. If port H is available and
MC68HC08AS20 emulation is selected, this port will be general I/O only. See Chapter 24 Keyboard
Interrupt Module (KBD) and Chapter 22 MC68HC08AZ32 Emulator Input/Output Ports.
1.4.16 CAN Transmit Pin (CANTx)/BDLC Transmit Pin (BDTxD)
If the part is configured as MC68HC08AZ32 emulator protocol, this pin is the digital output from the CAN
module (CANTx). Otherwise, if the part is configured as MC68HC08AS20 emulator protocol this pin is the
serial digital output from the BDLC module (BDTxD). See Chapter 23 MSCAN Controller or Chapter 28
Byte Data Link Controller-Digital (BDLC-D).
MC68HC908AT32 Data Sheet, Rev. 3.1
Freescale Semiconductor
31