參數(shù)資料
型號: CD1284
廠商: Intel Corp.
英文描述: IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
中文描述: 符合IEEE 1284兼容并行接口控制器兩個高速異步串行端口
文件頁數(shù): 78/176頁
文件大?。?/td> 2255K
代理商: CD1284
CD1284
IEEE 1284-Compatible Parallel Interface Controller
78
Datasheet
5.12.3
State Machine
The parallel port is controlled by a large synchronous state machine. The state machine is based on
the IEEE STD 1284 specification and conforms to all the functional modes (except extensibility
link options, none of which are currently
as of the print date of this document
defined).
5.12.4
Configuration
At power-up, the interface begins in Compatibility mode (Centronics mode) ready to accept data
from the master. Only the ETxfr bit (PCR[5]) is required to allow transfers in Compatibility mode
(parallel port only; datapath section is separate). PCR[7:5] enable transfers and Negotiation and
Manual modes.
Outputs
AkDaRq
PError
AkDaRq
AkDaRq
nAkRev
USER1
PerBsy
BUSY
PerBsy
PerBsy
PerAck
nWait
PerClk
ACK*
PerClk
PerClk
PerClk
Intr
nDatAv
FAULT*
nDatAv
nDatAv
nPerReq
USER2
XFlag
SELECT
XFlag
XFlag
XFlag
USER3
Table 20. Signal Names
(Sheet 2 of 2)
Names
Compatibility
Rev. NB
Rev. BT
ECP
EPP
Figure 11. FIFO Data Path Functional Diagram
Receive
D
D
P
P
FIFO (64 BYTES)
TAG (64 BITS)
DB[15:8]
DB[7:0]
PFSR
TAG BIT
(RECEIVE)
M
M
P
STATUS
TAG
TAG
TAG BIT
STATUS
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