MC68HC912D60 Motorola, MC68HC912D60 Datasheet - Page 56
MC68HC912D60
Manufacturer Part Number
MC68HC912D60
Description
Microcontrollers
Manufacturer
Motorola
Datasheet
1.MC68HC912D60.pdf
(460 pages)
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Pinout and Signal Descriptions
3.6.6 Port CAN
3.6.7 Port AD1
Technical Data
56
configured for output. On reset the DDRH bits are cleared and the
corresponding pin is configured for input.
Port PHUPD determines what type of resistive load is used for Port H
input pins when PUPH bit is set in the PUCR register. When PHUPD pin
is low, it loads a pull-down in all Port H input pins. When PHUPD pin is
high, it loads a pull-up in all Port H input pins.
In 80-pin version, the PHUPD is connected internally to VSS. The PH4
will have a pull-down. All port H pins should either be defined as outputs
or have their pull-downs enabled.
Setting the RDPH bit in register RDRIV causes all Port H outputs to have
reduced drive level. RDRIV can be written once after reset. RDRIV is not
in the address map in peripheral mode. Refer to
Input/Output.
The MSCAN12 uses two external pins, one input (RxCAN) and one
output (TxCAN). The TxCAN output pin represents the logic level on the
CAN: ‘0’ is for a dominant state, and ‘1’ is for a recessive state. If the
MSCAN is not used, TxCAN should be left unconnected and, due to an
internal pull-up, the RxCAN pin should not be tied to VSS.
RxCAN is on bit 0 of Port CAN, TxCAN is on bit 1. The remaining six pins
of Port CAN, available only in the 112-pin package, are controlled by
registers in the MSCAN12 address space.
In 80QFP all PortCAN[2:7] pins should either be defined as outputs or
have their pull-ups enabled.
Input to the analog-to-digital subsystem and general-purpose input.
When analog-to-digital functions are not enabled, the port has eight
general-purpose input pins, PAD1[7:0]. The ADPU bit in the ATD1CTL2
register enables the A/D function.
Freescale Semiconductor, Inc.
For More Information On This Product,
Pinout and Signal Descriptions
Go to: www.freescale.com
MC68HC912D60A — Rev 3.0
Bus Control and
MOTOROLA
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