MC912DG128ACPVE Datasheet, PDF (55/478 Pages) Freescale Semiconductor, Inc – Upward compatible with M68HC11 instruction set

Freescale Semiconductor, Inc.
Pinout and Signal Descriptions
Signal Descriptions
Table 3-2. MC68HC912DT128A Signal Description Summary
Pin Name
Shared
port
Pin
Number
112-pin
Description
Maskable interrupt request input provides a means of applying asynchronous
IRQ
PE1
55
interrupt requests to the MCU. Either falling edge-sensitive triggering or level-
sensitive triggering is program selectable (INTCR register).
XIRQ
PE0
56
Provides a means of requesting asynchronous nonmaskable interrupt requests
after reset initialization
SMODN/
BKGD/
-
TAGHI
During reset, this pin determines special or normal operating mode. After reset,
23
single-wire background interface pin is dedicated to the background debug
function. Pin function TAGHI used in instruction tagging. See Development
Support.
IX[2:0] PK[2:0] 109-111 Page Index register emulation outputs.
ECS
PK7
108 Emulation Chip select.
PW[3:0] PP[3:0] 112, 1–3 Pulse Width Modulator channel outputs.
SS
PS7
96 Slave select output for SPI master mode, input for slave mode or master mode.
SCK
PS6
95 Serial clock for SPI system.
SDO/MOSI PS5
94 Master out/slave in pin for serial peripheral interface
SDI/MISO PS4
93 Master in/slave out pin for serial peripheral interface
TxD1
PS3
92 SCI1 transmit pin
RxD1
PS2
91 SCI1 receive pin
TxD0
PS1
90 SCI0 transmit pin
RxD0
PS0
89 SCI0 receive pin
IOC[7:0]
PT[7:0]
18–15, Pins used for input capture and output compare in the timer and pulse
7–4 accumulator subsystem.
84/82/80/
AN1[7:0] PAD1[7:0] 78/76/74/ Analog inputs for the analog-to-digital conversion module 1
72/70
83/81/79/
AN0[7:0] PAD0[7:0] 77/75/73/ Analog inputs for the analog-to-digital conversion module 0
71/69
TEST
-
97
Used for factory test purposes. Do not connect in the application; may be
bonded to 5.5 V max.
TxCAN2⁽¹⁾
-
100 ^{MSCAN2 transmit pin (MC68HC912DT128A only). Leave unconnected if}
MSCAN2 is not used.
RxCAN2⁽¹⁾
TxCAN1
RxCAN1
TxCAN0
RxCAN0
SCL
-
-
-
-
-
PIB7
101 ^{MSCAN2 receive pin (MC68HC912DT128A only). Pin has internal pull-up;}
where msCAN module is not used, do not tie to VSS.
102 MSCAN1 transmit pin. Leave unconnected if MSCAN1 is not used.
103
MSCAN1 receive pin. Pin has internal pull-up; where msCAN module is not
used, do not tie to VSS.
104 MSCAN0 transmit pin. Leave unconnected if MSCAN0 is not used.
105
MSCAN0 receive pin. Pin has internal pull-up; where msCAN module is not
used, do not tie to VSS.
98 _I²_{C bus serial clock line pin}
MC68HC912DT128A — Rev 4.0
MOTOROLA
Pinout and Signal Descriptions
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Technical Data
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