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MC68CK338

32-Bit Modular Microcontroller

Freescale Semiconductor 

Freescale Semiconductor, Inc.

2 Signal Descriptions

2.1 Pin Characteristics

Table 2 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. Re-

fer to Table 4 for a description of output drivers. An entry in the discrete I/O column of Table 2 indicates

that a pin has an alternate I/O function. The port designation is given when it applies. Refer to Figure

1 for information about port organization.

Pin

Mnemonic

ADDR23/CS10

ADDR[22:19]/CS[9:6]

ADDR[18:0]

AS

AVEC

BERR

BG/CS1

BGACK/CS2

BKPT/DSCLK

BR/CS0

CLKOUT

CSBOOT

CTD[29:26]

CTD[10:4]

CTIO[5:0]

CTM31L

CTS24[B:A]

CTS18[B:A]

CTS14[B:A]

DATA[15:0]

DS

DSACK[1:0]

DSI/IFETCH

DSO/IPIPE

EXRTC

EXTAL

FC[2:0]/CS[5:3]

FREEZE/QUOT

HALT

IRQ[7:1]

MISO

MODCLK

MOSI

Table 2 MCU Pin Characteristics

Output

Driver

A

A

A

B

B

B

B

B

—

B

A

B

Ao

Ao

A

A

A

A

A

Aw

B

B

A

A

—

—

A

A

Bo

B

Bo

B

Bo

Input

Synchronized

Yes

Yes

Yes

Yes

Yes

Yes1

—

Yes

Yes

Yes

—

—

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes2

Yes

Yes

Yes

—

—

—

Yes

—

Yes1

Yes

Yes2

Yes2

Yes2

Input

Hysteresis

No

No

No

No

No

No

—

No

Yes

No

—

—

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

No

No

Yes

—

Yes

Yes

No

—

No

Yes

Yes

No

Yes

Discrete

I/O

—

O

—

I/O

I/O

—

—

—

—

—

—

—

I/O

I/O

I/O

I

I/O

I/O

I/O

—

I/O

I/O

—

—

—

—

O

—

—

I/O

I/O

I/O

I/O

Port

Designation

—

PC[6:3]

—

PE5

PE2

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

PE4

PE[1:0]

—

—

—

—

PC[2:0]

—

—

PF[7:1]

PQS0

PF0

PQS1

MC68CK338

MC68CK338TS/D

For More Information On This Product,

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