SPMC68CK338CPV14 datasheet(11/133 Pages) FREESCALE

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MC68CK338

MOTOROLA

MC68CK338TS/D

Data Strobe

Indicates that an external device should place valid data on the data bus

during a read cycle and that valid data has been placed on the bus by

the CPU during a write cycle

Data and Size

Acknowledge

DSACK[1:0]

Acknowledges to the SIML that data has been received for a write cycle,

or that data is valid on the data bus for a read cycle

Development Serial

In, Out, Clock

DSI, DSO,

DSCLK

Serial I/O and clock for background debugging mode

Function Codes

FC[2:0]

Identify processor state and current address space

Freeze

FREEZE

Indicates that the CPU has entered background mode

Halt

HALT

Suspend external bus activity

Instruction Pipeline

IFETCH, IPIPE

Indicate instruction pipeline activity

Interrupt Request

Level

IRQ[7:1]

Request interrupt service from the CPU

Master In Slave Out

MISO

Serial input to QSPI in master mode;

serial output from QSPI in slave mode

Clock Mode Select

MODCLK

Selects system clock source

Master Out Slave In

MOSI

Serial output from QSPI in master mode;

serial input to QSPI in slave mode

Port C

PC[6:0]

SIML digital output signals

Peripheral Chip

Select

PCS[3:0]

QSPI peripheral chip selects

Port E

PE[7:0]

SIML digital input or output port signals

Port F

PF[7:0]

SIML digital input or output port signals

Port QS

PQS[7:0]

QSM digital I/O port signals

Quotient Out

QUOT

Provides the quotient bit of the polynomial divider

Reset

RESET

System reset

Read-Modify-Write

Cycle

RMC

Indicates an indivisible read-modify-write instruction

Read/Write

R/W

Indicates the direction of data transfer on the bus

SCI Receive Data

RXD

Serial input to the SCI

QSPI Serial Clock

SCK

Clock output from QSPI in master mode;

clock input to QSPI in slave mode

Size

SIZ[1:0]

Indicates the number of bytes to be transferred during a bus cycle

Slave Select

Causes serial transmission when QSPI is in slave mode.

Causes mode fault in master mode

Three-State Control

TSC

Places all output drivers in a high-impedance state

SCI Transmit Data

TXD

Serial output from the SCI

External Filter

Capacitor

XFC

Connection for external phase-locked loop filter capacitor

Table 6 MCU Signal Function (Continued)

Signal Name

Mnemonic

Function

Freescale Semiconductor, Inc.

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