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參數(shù)資料
| 型號： | LZ85194 |
| 廠商： | Sharp Corporation |
| 英文描述： | IrDA Control Peripheral Engine(IrDA 控制外圍處理器) |
| 中文描述： | 紅外線控制周邊引擎（紅外線控制外圍處理器） |
| 文件頁數(shù)： | 29/76頁 |
| 文件大?。?/td> | 256K |
| 代理商： | LZ85194 |
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LZ85194
IrDA Control Peripheral Engine User
’
s Guide
23
Actual Interface Between PE and Microcontroller
Initialization
Table 13 shows the actual interface example (Command and Message transactions) from
PE Reset to the status where the IR communication becomes available.
1. Assert the Reset pinout to initialize PE, and then cancel the hardware reset. Note that
SCK pinout must be fixed to H until the hardware reset is cancelled.
2. Wait for a Message from PE to come. While PE holds the Message, the signal line MSG
is MSG = H. Issue Get_Message Command and obtain the Message.
3. If Give_Peripheral_Info is given, PE is requesting the Peripheral device specific information.
Use Set_Peripheral_Info Command and set the Peripheral device specific information.
4. After setting PFID and the peripheral Information by the Set_Peripheral_Info Com-
mand, one may configure the DC BIAS mode if necessary. Set_DcBias Command must
be issued at this point.
5. Enumeration must be proceeded by either Manual_Enum_withBinding, or Manual_Enum
Command. One may go on to the further step (step 7) without these explicit Enumeration
procedures. In this case, PE will perform Enumeration procedures automatically.
6. When the Peripheral device becomes
‘
Bound
’
for the very first time, it will be requested
for the Descriptor by the Host device. PE will forward this request to the μP as its Mes-
sage. When the MSG signal line becomes MSG = H, issue Get_Message Command
and receive the Message immediately. If the information is requested, issue
Set_Peripheral_Info Command and set the Peripheral device specific information.
7. Issue Send_Data_withAck or Send_Data Command for data transmission.
8. If Give_Peripheral_Info is given, PE is requesting the Peripheral device specific infor-
mation. Use Set_Peripheral_Info Command and set the appropriate Peripheral device
specific information as PE requests.
Table 13. Interface Example Between μP and PE (1)
PE STATUS AND OPERATION
Reset internal status to the default
configuration upon hardware reset.
SS-WIRE INTERFACE
μP OPERATION
Execute the Hardware Reset, (SCK
is fixed to H until reset is cancelled).
Wait for MSG = H, and issue
Get_Message Command. Receive
Message from PE, and acknowl-
edge that PE is requesting Peripher-
al information.
Write Peripheral information to PE.
Issue either Manual_Enum or
Manual_Enum_withBinding com-
mand to PE.
Transmit data.
PE then requires the Peripheral
device specific information, and
requests the specific information by
using Message. In order to acknowl-
edge μP of Message existence, PE
outputs MSG = H.
(M
→
H)
←
Get_Message
Give Peripheral_Info (0)
→
←
Set_Peripheral_Info (0)
Enumeration with Host device, and
IrDA Control communication status
will be switched to Unbound state.
Send Binding with Host device.
←
Manual_Enum_withBinding
←
Send_Data_withAck
(M
→
H)
←
Get_Message
Complete Binding with Host device,
and IrDA Control communication
status switches to Bound state.
Give Peripheral_Info (1)
→
Receive Message from PE.
Acknowledge that PE now requests
the Device Descriptor.
Start communication with the Host
device upon receipt of necessary
information.
←
Set_Peripheral_Info (1)
Write Device Descriptor to PE.
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