MC68CK338 데이터 시트보기 (PDF) - Freescale Semiconductor

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MC68CK338

32-Bit Modular Microcontroller

Freescale Semiconductor 

Freescale Semiconductor, Inc.

Table 2 MCU Pin Characteristics (Continued)

Pin

Mnemonic

Output

Driver

Input

Synchronized

Input

Hysteresis

Discrete

I/O

Port

Designation

PCS0/SS

Bo

Yes2

Yes

I/O

PQS3

PCS[3:1]

Bo

Yes2

Yes

I/O

PQS[6:4]

RESET

Bo

Yes

Yes

—

—

RMC

A

Yes

Yes

I/O

PE3

R/W

A

Yes

No

—

—

RXD

—

No

Yes

—

—

SCK

Bo

Yes2

Yes

I/O

PQS2

SIZ[1:0]

B

Yes

No

I/O

PE[7:6]

TSC

—

Yes

Yes

—

—

TXD

Bo

Yes2

Yes

I/O

PQS7

XFC

—

—

—

—

—

XRTC

—

—

—

—

—

XTAL

—

—

—

—

—

NOTES:

1. HALT and BERR synchronized only if late HALT or BERR.

2. DATA[15:0] synchronized during reset only. MODCLK and QSM pins synchronized only if used as port I/O pins.

2.2 MCU Power Connections

Table 3 MCU Power Connections

VDDSYN

VDDE, VSSE

VDDI, VSSI

VRTC

VSSRTCOSC

Clock Synthesizer

External periphery power (source and drain)

Internal module power (source and drain)

RTCSM/RAMSM standby power

Ground connection for real-time clock oscillator

2.3 MCU Driver Types

Table 4 MCU Output Driver Types

Type

A

Ao

Aw

B

Bw

Bo

Description

Output-only signals that are always driven; no external pull-up required

Type A output that can be operated in an open drain mode

Type A output with weak P-channel pull-up during reset

Three-state output that includes circuitry to pull up output before high impedance

is established, to ensure rapid rise time. An external holding resistor is required to

maintain logic level while the pin is in the high-impedance state.

Type B output with weak P-channel pull-up during reset

Type B output that can be operated in an open-drain mode

MOTOROLA

8

For More Information On This Product,

Go to: www.freescale.com

MC68CK338

MC68CK338TS/D

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