MC68331TS datasheet(11/84 Pages) FREESCALE

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MC68331TS/D

2.5 Signal Function

DSACK[1:0]

SIM

Input

DSCLK

CPU32

Input

Serial Clock

DSI

CPU32

Input

(Serial Data)

DSO

CPU32

Output

(Serial Data)

EXTAL

SIM

Input

—

FC[2:0]

SIM

Output

—

FREEZE

SIM

Output

HALT

SIM

Input/Output

IC[4:1]

GPT

Input

—

IFETCH

CPU32

Output

—

IPIPE

CPU32

Output

—

IRQ[7:1]

SIM

Input

MISO

QSM

Input/Output

—

MODCLK

SIM

Input

—

MOSI

QSM

Input/Output

—

OC[5:1]

GPT

Output

—

PAI

GPT

Input

—

PC[6:0]

SIM

Output

(Port)

PCS[3:0]

QSM

Input/Output

—

PE[7:0]

SIM

Input/Output

(Port)

PF[7:0]

SIM

Input/Output

(Port)

PQS[7:0]

QSM

Input/Output

(Port)

PCLK

GPT

Input

—

PWMA, PWMB

GPT

Output

—

QUOT

SIM

Output

—

RESET

SIM

Input/Output

RMC

SIM

Output

R/W

SIM

Output

1/0

RXD

QSM

Input

—

SCK

QSM

Input/Output

—

SIZ[1:0]

SIM

Output

—

QSM

Input

TSC

SIM

Input

—

TXD

QSM

Output

—

XFC

SIM

Input

—

XTAL

SIM

Output

—

Table 6 MCU Signal Function

Signal Name

Mnemonic

Function

Address Bus

ADDR[23:0]

24-bit address bus

Address Strobe

Indicates that a valid address is on the address bus

Autovector

AVEC

Requests an automatic vector during interrupt acknowledge

Bus Error

BERR

Indicates that a bus error has occurred

Bus Grant

Indicates that the MCU has relinquished the bus

Bus Grant Acknowledge

BGACK

Indicates that an external device has assumed bus mastership

Breakpoint

BKPT

Signals a hardware breakpoint to the CPU

Bus Request

Indicates that an external device requires bus mastership

System Clockout

CLKOUT

System clock output

Chip Selects

CS[10:0]

Select external devices at programmed addresses

Table 5 MCU Signal Characteristics (Continued)

Signal Name

MCU Module

Signal Type

Active State

Freescale Semiconductor, Inc.

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