Datasheet > MC68HC55

MC68HC55

更新时间： 2024-01-28 23:59:09

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		/
页数	文件大小	规格书
40页	290K
描述
Two-Channel CMOS ASIC Device

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技术参数
数据手册

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MC68HC55 技术参数

是否Rohs认证：	符合	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	SOP,
针数：	16	Reach Compliance Code：	compliant
HTS代码：	8542.31.00.01	风险等级：	5.75
地址总线宽度：	16	边界扫描：	NO
最大时钟频率：	4 MHz	外部数据总线宽度：	16
JESD-30 代码：	R-PDSO-G16	JESD-609代码：	e3
长度：	9.9 mm	低功率模式：	YES
湿度敏感等级：	3	串行 I/O 数：	4
端子数量：	16	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.75 mm
标称供电电压：	5 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子面层：	Matte Tin (Sn)	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	3.9 mm
uPs/uCs/外围集成电路类型：	SERIAL IO/COMMUNICATION CONTROLLER, SERIAL	Base Number Matches：	1

MC68HC55 数据手册

MC68HC55 Technical Data

CSU - CENTRAL SENSING UNIT

MC68HC16P3

MCU

DSI0F

DSI0S

DSI0R

MC68HC55

DSI/P

DSI0O

PWM Pin

SCLK

2-WIRE BUS

GND

SCK

MOSI

MISO

CLK

DSI1F

DSI1S

DSI1R

DSI1O

GND

I/O Pin

SIGNAL

RETURN

• • •

SLAVE 1

SLAVE 2

SLAVE 3

SLAVE 4

SLAVE 15

Figure 1-1. DSI System Connections

(Other Arrangements Possible)

After reset, the master MCU must first configure the DSI system by

assigning a unique 4-bit address to each remote peripheral unit on the

2-wire DSI bus. When the system is initially powered up, the 2-wire bus

idles at about 25 volts to provide power to the local power supply

capacitor at the first node of the distributed bus. A bus switch in each

peripheral node is initially opened until that node has been programmed

with a 4-bit address. After power up, the 2-wire bus only goes as far as

the first node. The master MCU provides a series of SPI commands to

the DSI/D to send a 16-bit (plus 4-bit CRC) message instructing it to

assign a 4-bit address to the first node. Address 0000 is a global address

which addresses all nodes whether or not they have been initialized with

their unique 4-bit address. During this first message, no remote node will

respond (provide return data to the master). This first message sets the

address of the first node, which causes it to close its bus switch.The bus

now goes to the first and second nodes along the 2-wire bus, and the

second node power supply capacitor becomes charged by the 25-volt

idle level on the bus.

Technical Data

MC68HC55

DSI/D (Distributed System Interface – Digital)

1 2 345 6 7...40

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