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MC68331CEH16 Datasheet, PDF (9/84 Pages) Freescale Semiconductor, Inc – 32-Bit Modular Microcontroller | |||
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Freescale Semiconductor, Inc.
2 Signal Descriptions
2.1 Pin Characteristics
The following table shows MCU pins and their characteristics. All inputs detect CMOS logic levels. All
inputs can be put in a high-impedance state, but the method of doing this differs depending upon pin
function. Refer to Table 4, for a description of output drivers. An entry in the discrete I/O column of Ta-
ble 2 indicates that a pin has an alternate I/O function. The port designation is given when it applies.
Refer to the MCU Block Diagram for information about port organization.
Pin
Mnemonic
ADDR23/CS10/ECLK
ADDR[22:19]/CS[9:6]
ADDR[18:0]
AS
AVEC
BERR
BG/CS1
BGACK/CS2
BKPT/DSCLK
BR/CS0
CLKOUT
CSBOOT
DATA[15:0]1
DS
DSACK1
DSACK0
DSI/IFETCH
DSO/IPIPE
EXTAL2
FC[2:0]/CS[5:3]
FREEZE/QUOT
IC4/OC5
IC[3:1]
HALT
IRQ[7:1]
MISO
MODCLK1
MOSI
OC[4:1]
PAI3
PCLK3
PCS0/SS
PCS[3:1]
PWMA, PWMB
R/W
RESET
RMC
Table 2 MCU Pin Characteristics
Output
Driver
A
A
A
B
B
B
B
B
â
B
A
B
Aw
B
B
B
A
A
â
A
A
A
A
Bo
B
Bo
B
Bo
A
â
â
Bo
Bo
A
A
Bo
B
Input
Synchronized
Y
Y
Y
Y
Y
Y
â
Y
Y
Y
â
â
Y
Y
Y
Y
Y
â
â
Y
â
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
â
Y
Y
Y
Input
Hysteresis
N
N
N
N
N
N
â
N
Y
N
â
â
N
N
N
N
Y
â
Special
N
â
Y
Y
N
Y
Y
N
Y
Y
Y
Y
Y
Y
â
N
Y
N
Discrete
I/O
O
O
â
I/O
I/O
â
â
â
â
â
â
â
â
I/O
I/O
I/O
â
â
â
O
â
I/O
I/O
â
I/O
I/O
I/O
I/O
I/O
I
I
I/O
I/O
O
â
â
I/O
Port
Designation
â
PC[6:3]
â
PE5
PE2
â
â
â
â
â
â
â
â
PE4
PE1
PE0
â
â
â
PC[2:0]
â
GP4
GP[7:5]
â
PF[7:1]
PQS0
PF0
PQS1
GP[3:0]
â
â
PQS3
PQS[6:4]
â
â
â
PE3
MC68331TS/D
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