MC68CK338 データシートの表示（PDF） - Freescale Semiconductor

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MC68CK338

32-Bit Modular Microcontroller

Freescale Semiconductor 

Freescale Semiconductor, Inc.

Table 5 MCU Signal Characteristics (Continued)

Signal Name

RESET

RMC

R/W

RXD

SCK

SIZ[1:0]

SS

TSC

TXD

XFC

XRTC

XTAL

MCU Module

SIML

SIML

SIML

QSM

QSM

SIML

QSM

SIML

QSM

SIML

CTM6

SIML

Signal Type

Input/Output

Output

Output

Input

Input/Output

Output

Input

Input

Output

Input

Output

Output

Active State

0

0

0

—

—

—

0

—

—

—

—

—

2.5 Signal Function

Table 6 MCU Signal Function

Signal Name

Address Bus

Address Strobe

Autovector

Bus Error

Bus Grant

Bus Grant

Acknowledge

Breakpoint

Bus Request

System Clockout

Chip Selects

Boot Chip Select

Configurable Timer

Double-Action

Configurable Timer

Modulus Counter

Load

RTC Configurable

Timer Oscillator

Configurable Timer

Port Input/Output

Configurable Timer

Single-Action

Crystal Oscillator

Data Bus

Mnemonic

ADDR[23:0]

AS

AVEC

BERR

BG

BGACK

Function

24-bit address bus

Indicates that a valid address is on the address bus

Requests an automatic vector during interrupt acknowledge

Signals a bus error to the CPU

Indicates that the MCU has relinquished the bus

Indicates that an external device has assumed bus mastership

BKPT

BR

CLKOUT

CS[10:0]

CSBOOT

CTD[29:26],

CTD[10:4]

CTM31L

Signals a hardware breakpoint to the CPU

Indicates that an external device requires bus mastership

System clock output

Select external devices at programmed addresses

Chip select for external boot startup ROM

Double-action submodule (DASM) signals.

Can also be used as general purpose I/O pins

External load for modulus counter.

Can also be used as general purpose input

EXRTC, XRTC CTM real time clock oscillator input/output

CTIO[5:0] General-purpose I/O pins

CTS24[B:A]

CTS18[B:A]

CTS14[B:A]

EXTAL, XTAL

DATA[15:0]

Single-action submodule (SASM) signals.

Can also be used as general purpose I/O pins

Connections for clock synthesizer circuit reference; a crystal or an

external oscillator can be used

16-bit data bus

MOTOROLA

10

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MC68CK338

MC68CK338TS/D

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