Motorola 68HC12B32 User Manual
12
MCU_PORT
The MCU_PORT provides access to the peripheral features and I/O lines of the HC12 as
follows:
follows:
A14
1 2
A15
D0
3 4
D1
D2
5 6
D3
D4
7 8
D5
D6
9 10 D7
/XIRQ 11 12 /DBE
VFP 13 14 /LSTRB
VRH 15 16 VRL
+5V 17 18 GND
PAD0 19 20 PAD1
PAD2 21 22 PAD3
PAD4 23 24 PAD5
PAD6 25 26 PAD7
PAD2 21 22 PAD3
PAD4 23 24 PAD5
PAD6 25 26 PAD7
PS0 / RXD
27 28 PS1 / TXD
PS2 29 30 PS3
PS4 31 32 PS5
PS6 33 34 PS7
PS4 31 32 PS5
PS6 33 34 PS7
PC6 35 36 PC5
PC4 37 38 PC3
PC2 39 40
PC4 37 38 PC3
PC2 39 40
PC1 / TXCAN
PC0 / RXCAN
41 42 PP7
PP6 43 44 PP5
PP4 45 46 PP3
PP2 47 48 PP1
PP0 49 50 PT1
PP4 45 46 PP3
PP2 47 48 PP1
PP0 49 50 PT1
PT0 51 52 PT3
PT2 53 54 PT5
PT4 55 56 PT7
PT6 57 58 GND
+5V 59 60 GND
PT2 53 54 PT5
PT4 55 56 PT7
PT6 57 58 GND
+5V 59 60 GND
D0 – D7 Low Byte of the Data Bus in Wide Expanded
Mode. Port B in Single Chip Mode.
Mode. Port B in Single Chip Mode.
/XIRQ HC12 XIRQ interrupt input .
VFP Programming voltage, 12v, when VPP_EN jumper is
on.
on.
/LSTRB HC12 LSTRB (PE3) output indicates 8 bit bus
access. Should be enabled in software for bus use.
access. Should be enabled in software for bus use.
PP0 – PP7 HC12 Port P I/O or PWM port. PP3-7 also
used by the KEYPAD Port.
used by the KEYPAD Port.
PT0 – PT7 HC12 Port T I/O or Timer port.
VRH / VRL HC12 A/D Converter Reference Pins. See
A/D Reference Section.
A/D Reference Section.
PAD0 – PAD7 HC12 Port AD is an input port or the A/D
Converter inputs.
Converter inputs.
PS0 – PS7 HC12 Port S I/O or Serial Port lines. PS4-7
also used by the KEYPAD Port.
also used by the KEYPAD Port.
RXD / TXD Serial Port (SCI) receive and transmit pins.
PC0 – PC7 HC12 PDLC I/O or CAN lines.
CAN_PORT
1
GND
2
CAN-H
3
CAN-L
4
+5V
The CAN_PORT connector provides an interface to the MSCAN12 on
the microcontroller. See the MC68HC912BC32 data sheet for
information on using this peripheral.
the microcontroller. See the MC68HC912BC32 data sheet for
information on using this peripheral.