Datasheet

MSCAN Controller
Technical Data MC68HC912DT128A — Rev 4.0
366 MSCAN Controller MOTOROLA
18.13.15 msCAN12 Port CAN Control Register (PCTLCAN)
The following bits control pins 7 through 2 of Port CAN when they are
implemented externally.
PUPCAN — Pull-Up Enable Port CAN
0 = Pull mode disabled for Port CAN.
1 = Pull mode enabled for Port CAN.
RDPCAN — Reduced Drive Port CAN
0 = Reduced drive disabled for Port CAN.
1 = Reduced drive enabled for Port CAN.
18.13.16 msCAN12 Port CAN Data Register (PORTCAN)
Port bits 7 to 2 will read zero when configured as inputs because they
are not implemented externally.
When configured as output, port bits 7 to 2 will read the last value
written.
Reading bits 1 and 0 returns the value of the TxCan and RxCan pins,
respectively.
18.13.17 msCAN12 Port CAN Data Direction Register (DDRCAN)
DDCAN7 – DDCAN2 — This bits served as memory locations since
there are no corresponding external port pins.
Bit 7654321Bit 0
PCTLCANR000000
PUPCAN RDPCAN
$013D W
RESET 0 0 0 0 0 0 0 0
Bit 7654321Bit 0
PORTCAN R
PCAN7 PCAN6 PCAN5 PCAN4 PCAN3 PCAN2
TxCAN RxCAN
$013E W
RESET -----
Bit 7654321Bit 0
DDRCAN R
DDCAN7 DDCAN6 DDCAN5 DDCAN4 DDCAN3 DDCAN2
00
$013F W
RESET 0 0000000
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
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