參數(shù)資料
型號: MC68331CFC25B1
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 25 MHz, MICROCONTROLLER, PQFP132
封裝: 0.950 X 0.950 INCH, 0.025 INCH PITCH, PLASTIC, QFP-132
文件頁數(shù): 89/90頁
文件大小: 481K
代理商: MC68331CFC25B1
MC68331
MOTOROLA
MC68331TS/D
9
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.
Table 2 MCU Pin Characteristics
Pin
Mnemonic
Output
Driver
Input
Synchronized
Input
Hysteresis
Discrete
I/O
Port
Designation
ADDR23/CS10/ECLK
A
Y
N
O
ADDR[22:19]/CS[9:6]
A
Y
N
O
PC[6:3]
ADDR[18:0]
A
Y
N
AS
B
Y
N
I/O
PE5
AVEC
B
Y
N
I/O
PE2
BERR
BY
N
BG/CS1
B
BGACK/CS2
B
Y
N
BKPT/DSCLK
Y
BR/CS0
BY
N
CLKOUT
A
CSBOOT
B
DATA[15:0]1
Aw
Y
N
DS
B
Y
N
I/O
PE4
DSACK1
B
Y
N
I/O
PE1
DSACK0
B
Y
N
I/O
PE0
DSI/IFETCH
AY
Y
DSO/IPIPE
A—
EXTAL2
Special
FC[2:0]/CS[5:3]
A
Y
N
O
PC[2:0]
FREEZE/QUOT
A
IC4/OC5
A
Y
I/O
GP4
IC[3:1]
A
Y
I/O
GP[7:5]
HALT
Bo
Y
N
IRQ[7:1]
B
Y
I/O
PF[7:1]
MISO
Bo
Y
I/O
PQS0
MODCLK1
B
Y
N
I/O
PF0
MOSI
Bo
Y
I/O
PQS1
OC[4:1]
A
Y
I/O
GP[3:0]
PAI3
Y
I
PCLK3
Y
I
PCS0/SS
Bo
Y
I/O
PQS3
PCS[3:1]
Bo
Y
I/O
PQS[6:4]
PWMA, PWMB
A
O
R/W
AY
N
RESET
Bo
Y
RMC
B
Y
N
I/O
PE3
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