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): 130/176頁
文件大小: 2255K
代理商: CD1284
CD1284
IEEE 1284-Compatible Parallel Interface Controller
130
Datasheet
7.5.2
Modem Change Option Register 2
7.5.3
Modem Signal Value Register 1
Bit
Description
7:4
DSRzd, CTSzd, RIzd and CDzd:
Each of these bits controls its corresponding input pin. If the bit is set, the
function is enabled and transitions from one-to-zero (zeros detect) generate an SVCREQM* service request.
3:0
DTRth3 through DTRth0:
These bits form a binary value to determine when the DTR output is negated
(based on the number of characters in the receive FIFO). When the FIFO holds more characters than this
value, DTR is negated, informing the remote to stop transmission. This value must be set to a value
numerically larger than the value set for the receive FIFO threshold in COR3.
Register Name: MCOR2
Register Description: Modem Change Option Register 2
Access: Read/Write
Bit 7
Bit 6
DSRod
CTSod
8-Bit Hex Address: 16
Default Value: 00
Bit 5
RIod
Bit 4
CDod
Bit 3
0
Bit 2
0
Bit 1
0
Bit 0
0
Bit
Description
7:4
DSRod, CTSod, RIod, CDod:
Each of these bits controls its corresponding input pin. If the bit is set, the
function is enabled and transitions from
0
-to-
1
(ones detect) generate an SVCREQM* service request.
3:0
These bits are not used and must be
0
.
Register Name: MSVR1
Register Description: Modem Signal Value Register 1
Access: Read/Write
Bit 7
Bit 6
DSR
CTS
8-Bit Hex Address: 6C
Default Value: XX
Bit 5
RI
Bit 4
CD
Bit 3
0
Bit 2
0
Bit 1
0
Bit 0
RTS
DTRth3
DTRth2
DTRth1
DTRth0
Number of Characters in FIFO
0
0
0
0
Automatic DTR mode disabled.
0
0
0
1
1 character
0
0
1
0
2 characters
1
0
1
1
11 characters
1
1
0
0
12 characters
1
1
0
1
Not used.
1
1
1
0
1
1
1
1
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