參數(shù)資料
型號(hào)： LZ85202
廠商： Sharp Corporation
英文描述： IrDA Control Host Controller with USB Interface(帶USB接口的IrDA控制主控制器)
中文描述： 紅外線控制主機(jī)控制器與USB接口（帶的USB接口的紅外線控制主控制器）
文件頁(yè)數(shù)： 26/48頁(yè)
文件大小： 219K
代理商： LZ85202
LZ85202
20
IrDA Control Host Controller with USB Interface User
’
s Guide
Figure 12 is an example of the IrDA Control protocol processing, assuming that a PC per-
forms is the USB Root Hub for the Host device.
While the configuration of the USB Dongle operation mode is set to
‘
Emulation Mode
’
(see
the
‘
Operation Mode (USB Configuration)
’
section), a PC input wireless peripheral that has
keyboard and mouse capabilities can be implemented by using EP1 and EP3 of HC (see
Figure 12). The HC will receive the keyboard data from EP1 and the mouse data from EP3.
HC will also be requested the descriptor of the USB protocol by the Dongle Driver, for
which EP0 is used to exchange the descriptor with the IrDA Control peripherals and
respond to.
Memorizing Enumeration Information
An external serial EEPROM can be used to memorize the Enumeration information and/
or address even if the main power supply of the Host device hardware is turned off (see
the
‘
Interface with Serial EEPROM
’
and
‘
Serial EEPROM
’
sections).
This function allows the use of the IrDA Control Peripherals, which are already enumerated
to the Host device, under the same user environment next time the users turn on the Host
device. Following are the items to be memorized to the serial EEPROM:
Host Address
Host ID
PFID, Peripheral Information
The Enumeration information allows users to use the same IrDA Control peripherals without
enumeration process. The old data on the serial EEPROM is renewed in a data exchange
fashion when writing the new data to it is completed. For this data exchange, error check
code is added to ensure the data renewal. To memorize the Enumeration information to the
serial EEPROM of the USB Dongle, HC pinouts of EEPCS, EEPCK, and EEPDATA must
be correctly connected to the serial EEPROM pinouts of CS, SK, and DI.
Figure 12. Example of Using EP1 and EP3 Simultaneously
(Keyboard with Pointing Device)
LZ85202-12
EP3
EP0
HC
IrDA
CONTROL
PE
(Mouse)
IrDA
CONTROL
PE
(Keyboard)
KEYBOARD WITH
POINTING DEVICE
EP0
EP1
EP3
EP0
EP0
EP1
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