Datasheet

Pinout and Signal Descriptions
Technical Data MC68HC912DT128A — Rev 4.0
64 Pinout and Signal Descriptions MOTOROLA
When the PUPT bit in the TMSK2 register is set, all input pins are pulled
up internally by an active pull-up device. Pullups are disabled after reset.
Setting the RDPT bit in the TMSK2 register configures all port T outputs
to have reduced drive levels. Levels are at normal drive capability after
reset. The TMSK2 register can be read or written anytime after reset.
Refer to Enhanced Capture Timer.
Table 3-3. MC68HC912DT128A Port Description Summary
Port Name
Pin
Numbers
Data Direction
Register (Address)
Description
112-pin
Port A
PA[7:0]
64-57
In/Out
DDRA ($0002)
Port A and port B pins are used for address and data in
expanded modes. The port data registers are not in the
address map during expanded and peripheral mode
operation. When in the map, port A and port B can be read or
written any time.
DDRA and DDRB are not in the address map in expanded or
peripheral modes.
Port B
PB[7:0]
31–24
In/Out
DDRB ($0003)
Port AD1
PAD1[7:0]
84/82/80/7
8/76/74/72
/70
In Analog-to-digital converter 1 and general-purpose I/O.
Port AD0
PAD0[7:0]
83/81/79/7
7/75/73/71
/69
In Analog-to-digital converter 0 and general-purpose I/O.
Port CAN2
PCAN2[1:0]
(1)
100–101
PCAN2[1] Out
PCAN2[0] In
PCAN2[1:0] are used with the MSCAN2 module and cannot be
used as general purpose I/O (MC68HC912DT128A only).
Port CAN1
PCAN1[1:0]
102–103
PCAN1[1] Out
PCAN1[0] In
PCAN1[1:0] are used with the MSCAN1 module and cannot be
used as general purpose I/O.
Port CAN0
PCAN0[1:0]
104–105
PCAN0[1] Out
PCAN0[0] In
PCAN0[1:0] are used with the MSCAN0 module and cannot be
used as general purpose I/O.
Port IB
PIB[7:6]
98–99
In/Out
DDRIB ($00E7)
General purpose I/O. PIB[7:6] are used with the I-Bus
module
when enabled.
Port IB
PIB[5:4]
(2)
100–101
In/Out
DDRIB ($00E7)
General purpose I/O (MC68HC912DG128A only).
Port E
PE[7:0]
36–39,
53–56
PE[1:0] In
PE[7:2] In/Out
DDRE ($0009)
Mode selection, bus control signals and interrupt service
request signals; or general-purpose I/O.
Port K
PK[7,3:0]
13,
108-111
In/Out
DDRK ($00FD)
Page index emulation signals in expanded or peripheral mode
or general-purpose I/O.
Port P
PP[3:0]
112,
1–3
In/Out
DDRP ($0057)
General-purpose I/O. PP[3:0] are used with the pulse-width
modulator when enabled.
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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