參數(shù)資料
型號(hào): MC68HC05JB4DW
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數(shù): 100/134頁
文件大?。?/td> 2440K
代理商: MC68HC05JB4DW
GENERAL RELEASE SPECIFICATION
February 24, 1999
UNIVERSAL SERIAL BUS MODULE
REV
10.2
OVERVIEW
This section provides an overview of the Universal Serial Bus (USB) module in the
MC68HC05JB4. This USB module is designed to serve as a low-speed (LS) USB
device per the Universal Serial Bus Specication Rev 1.0. Three types of USB
data transfers are supported: control, interrupt, and bulk (transmit only). Endpoint
0 functions as a receive/transmit control endpoint. Endpoints 1 and 2 can function
as interrupt or bulk, but only in the transmit direction.
A block diagram of the USB module is shown Figure 10-1. The USB module
manages communications between the host and the USB function. The module is
partitioned into four functional blocks. These blocks consist of a 3.3 volt regulator,
a dual function transceiver, the USB control logic, and the endpoint registers. The
blocks are further detailed in Section 10.4.
Figure 10-1. USB Block Diagram
10.2.1 USB Protocol
shows
the
various
transaction
types
supported
by
the
MC68HC05JB4 USB module. The transactions are portrayed as error free. The
effect of errors in the data ow are discussed later.
D+
D–
USB
CONTR
OL
LOGIC
T
R
ANSCEIV
ER
RCV
VPIN
VMIN
VPOUT
VMOUT
REGULATOR
3.3V OUT
CPU BUS
USB REGISTERS
USB
Upstream
Port
F
re
e
sc
a
le
S
e
m
ic
o
n
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to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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.
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