參數(shù)資料
型號(hào)： MC68HC55CD
廠商： FREESCALE SEMICONDUCTOR INC
元件分類(lèi)： 微控制器/微處理器
英文描述： 4 CHANNEL(S), SERIAL COMM CONTROLLER, PDSO16
封裝： SOIC-16
文件頁(yè)數(shù)： 36/40頁(yè)
文件大?。?/td> 284K
代理商： MC68HC55CD
MC68HC55 Technical Data
Pin Assignments
MC68HC55
Technical Data
MC68HC55CD Pin Assignments and Descriptions
5
The second message assigns the address to the second node and
receives a response message from the first node at the same time. The
first node ignores the second address assignment message because it
already has an address. During the third address assignment message,
only the second node responds (a node only responds to the assignment
message once).This sequence continues until all nodes have been
assigned addresses and have responded that the assignment was
successful.
Now that the nodes each have a unique address, messages can be sent
and received from individual nodes. Notice that during a message, the
node that is receiving the command and the node that is returning a
response are not necessarily the same node.
Nodes do not have any permanently programmed address. Addresses
are assigned according to the order of the devices on the bus every time
power is applied. Multiple nodes may be replaced and/or the system can
be reconfigured by adding nodes to the bus, and the system will
automatically reconfigure itself at the next power-on.
Section 2. MC68HC55CD Pin Assignments and Descriptions
Refer to Figure 2-1 for the MC68HC55CD pin assignments. A brief
description of the pins is given in this section.
2.1 Pin Assignments
Figure 2-1. MC68HC55CD Pin Assignments
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VDD
DSI0F
DSI0S
DSI0R
N/C
DSI1F
DSI1S
DSI1R
SCLK
CLK
DI
DO
CS
RESET
GND
16-lead narrow body SOIC, package #751B-05 issue J
INT
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