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)： 28/48頁(yè)
文件大?。?/td> 219K
代理商： LZ85202
LZ85202
22
IrDA Control Host Controller with USB Interface User
’
s Guide
Setting the Host Address (Using DIP Switch)
The Host Address is determined after the IrDA Control Host device receives the wakeup
packet from the Peripherals. At the same time, the Host ID is also determined. The HC sets
the communication controller timer when the wakeup packet is received, and sets the Host
Address by random numbers.
In the IrDA Control system, there is a possibility that multiple Host devices have the same
Host Address in the reached range because of Host Address generated by random num-
bers. Manual configuration of the Host Address by the use of DIP switch may minimize this
possibility. If the DIP switch is used, the upper nibble of the Host Address will be set with the
4 bits information of the DIP switch, and the lower nibble will be determined by the random
numbers. Using DIP switch, HC configures the Host Address by the following instruction;
1. Observe the DIP switch value first.
2. Attempt to restore the Host Address
When HC is to restore the Host Address, Host Address configuration varies whether the
restoration succeeded or failed;
Case A Restoration Failed
(A-1) DIP switch value is NOT
‘
0
’
;
→
Upper nibble by DIP switch, lower nibble by random number.
(A-2) DIP switch value is
‘
0
’
;
→
All by random number.
Case B Restoration Succeeded
(A-1) DIP switch value is NOT
‘
0
’
, and the restored Host Address differs from
that of EEPROM;
→
Upper nibble by DIP switch, lower nibble by random number.
(A-2) DIP switch value is
‘
0
’
;
→
Use restored Host Address.
For other cases when the DIP switch value is
‘
0
’
, Host Address may be changed by the
USB request. In changing the Host Address by the USB request, the upper nibble is con-
figured by the USB request, and the lower nibble by the random number.
After all, if the Host Address is changed, HC performs the following configuration;
3. Re-generate the HostID by random number, and initialize the Enumeration Table.
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