Pinout and Signal Descriptions
Technical Data
MC68HC912DG128 — Rev 3.0
50
Pinout and Signal Descriptions
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MOTOROLA
XIRQ
PE0
56
Provides a means of requesting asynchronous nonmaskable interrupt
requests after reset initialization
During reset, this pin determines special or normal operating mode. After
reset, single-wire background interface pin is dedicated to the
background debug function. Pin function TAGHI used in instruction
tagging. See
Development Support
.
Page Index register emulation outputs.
Emulation Chip select.
Pulse Width Modulator channel outputs.
Slave select output for SPI master mode, input for slave mode or master
mode.
Serial clock for SPI system.
Master out/slave in pin for serial peripheral interface
Master in/slave out pin for serial peripheral interface
SCI1 transmit pin
SCI1 receive pin
SCI0 transmit pin
SCI0 receive pin
18–15, 7–4Pins used for input capture and output compare in the timer and pulse
accumulator subsystem.
84/82/80/7
8/76/74/72/
70
83/81/79/7
7/75/73/71/
69
102
MSCAN1 transmit pin
103
MSCAN1 receive pin
104
MSCAN0 transmit pin
105
MSCAN0 receive pin
98
I
2
C bus serial clock line pin
99
I
2
C bus serial data line pin
8–11,
19–22
input transitions from high to low or from low to high (KWPJ).
32–35,
49–52
input transitions from high to low or from low to high (KWPH).
SMODN/
BKGD/
TAGHI
-
23
IX[2:0]
ECS
PW[3:0]
PK[2:0]
PK7
PP[3:0]
109-111
108
112, 1–3
SS
PS7
96
SCK
PS6
PS5
PS4
PS3
PS2
PS1
PS0
95
94
93
92
91
90
89
SDO/MOSI
SDI/MISO
TxD1
RxD1
TxD0
RxD0
IOC[7:0]
PT[7:0]
AN1[7:0]
PAD1[7:0]
Analog inputs for the analog-to-digital conversion module 1
AN0[7:0]
PAD0[7:0]
Analog inputs for the analog-to-digital conversion module 0
TxCAN1
RxCAN1
TxCAN0
RxCAN0
SCL
-
-
-
-
PIB7
SDA
PIB6
KWJ[7:0]
PJ[7:0]
Key wake-up and general purpose I/O; can cause an interrupt when an
KWH[7:0]
PH[7:0]
Key wake-up and general purpose I/O; can cause an interrupt when an
Table 3-2. Signal Description Summary
Pin Name
Shared
port
Pin
Number
112-pin
Description
F
Freescale Semiconductor, Inc.
n
.