參數資料
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： 134/176頁
文件大?。?/td> 2255K
代理商： CD1284
CD1284
—
IEEE 1284-Compatible Parallel Interface Controller
134
Datasheet
7.6.3
Special Character Register 3
7.6.4
Special Character Register 4
7.6.5
Received Character Range Detection
If enabled (by bit 7 of COR3), the CD1284 checks received characters to see if they fall within a
range of values. SCRL and SCRH set the range and the checking occurs inclusive of the values
programmed into these registers. If a received character is determined to be within the range, a
special character detect exception service request is posted. When set to
‘
111
’
, RDSR[6:4] indicate
a range detect. Note that this range checking is performed in addition to the normal special
character detection on SCHR4
–
SCHR1.
7.6.6
Special Character Range
—
High
SCRH sets the upper inclusive value for range detection.
7.6.7
Special Character Range
—
Low
SCRL sets the lower inclusive value for range detection.
Register Name: SCHR3
Register Description: Special Character Register 3
Access: Read/Write
Bit 7
Bit 6
8-Bit Hex Address: 1C
Default Value: 00
Bit 5
Bit 4
Special Character 3
Bit 3
Bit 2
Bit 1
Bit 0
Register Name: SCHR4
Register Description: Special Character Register 4
Access: Read/Write
Bit 7
Bit 6
8-Bit Hex Address: 1D
Default Value: 00
Bit 5
Bit 4
Special Character 4
Bit 3
Bit 2
Bit 1
Bit 0
Register Name: SCRH
Register Description: Special Character Range, high
Access: Read/Write
Bit 7
Bit 6
8-Bit Hex Address: 23
Default Value: 00
Bit 5
Bit 4
Character Range
—
high
Bit 3
Bit 2
Bit 1
Bit 0
Register Name: SCRL
Register Description: Special Character Range, low
Access: Read/Write
Bit 7
Bit 6
8-Bit Hex Address: 22
Default Value: 00
Bit 5
Bit 4
Character Range
—
low
Bit 3
Bit 2
Bit 1
Bit 0
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