參數(shù)資料
型號(hào): Z86E18
廠商: ZiLOG, Inc.
英文描述: USB Device Controller(鍵盤及其它外設(shè)的理想的USB微控制器)
中文描述: USB設(shè)備控制器(鍵盤及其它外設(shè)的理想的的USB微控制器)
文件頁數(shù): 24/31頁
文件大?。?/td> 311K
代理商: Z86E18
Z86E18/U18
1.5 MBPS USB Device Controller for Keyboards and HID-Class Peripherals
Zilog
24
P R E L I M I N A R Y
DS97KEY2301
USB REGISTER DESCRIPTIONS
(Continued)
Figure 34. Endpoint 0 FIFO Register
Bit
7:0
uc
R/W
SIE
R/W
Description
The Endpoint 0 FIFO data register.
Figure 35. IN CS Register
Bit No
7
6
5:2
Bit Description
Flush FIFO
Force DATA0
IN MAXP
uc
R/W
R/W
R/W
SIE
R/W
R/W
R
Description
The microcontroller sets this bit to flush the IN FIFO.
The microcontroller sets this bit to force next IN data to be DATA0.
Before setting in_pkt_rdy, the microcontroller writes the maximum packet
size to these bits. The default value = 8 Bytes.
The SIE writes this register, when it encounters a protocol violation, and
issues a STALL handshake to the current transfer. The microcontroller sets
this bit, when it receives a SET_FEATURE (ENDPOINT_STALL), and clears
it, when it receives a CLEAR_FEATURE (ENDPOINT_STALL).
After the microcontroller has filled the data, it sets this bit. It is cleared by
SIE upon successful transmission of data.
1
Force STALL
R/W
W
0
In Packet Ready R/W
R/W
D7
D6
D5
D4
D3
D2
D1 D0
FIFO Data
h
Flush FIFO
D7
D6
D5
D4
D3
D2
D1
D0
In_pkt _rdy
Force Stall
IN MAXP
Force DATA0
0 h
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