參數(shù)資料
型號: CD1283
廠商: Intel Corp.
英文描述: IEEE 1284-Compatible Parallel Interface
中文描述: 符合IEEE 1284兼容并行接口
文件頁數(shù): 74/94頁
文件大小: 1237K
代理商: CD1283
CD1283
IEEE 1284-Compatible Parallel Interface
74
Datasheet
7.4.13
Signal Status Register
The bits in this register show the results of changes specified in the ODR and ZDR. Normally, the
host will read this register in response to a signal-change interrupt generated by the CD1283. SSR
is active and valid only in Manual mode. Bits 7:4 return zeros when read. A write of any value to
SSR clears it.
7.4.14
Zeros Detect Register
When the bits 3:0 in ZDR are set, it enables the CD1283 to generate an interrupt (if the SigCh bit in
PCIER is set) when the selected signal changes from high-to-low (falling edge). Bits 7:4 are
reserved and must be written as
0
; these bits return
0
when read. This register is enabled only
during Manual mode.
7.5
Special Register
7.5.1
Reset Command Register
Table 11. SPR Binary Values to Set 500-ns Pulse Widths
Clock
(MHz)
SPR Value
Resultant Pulse Width
(ns)
16
8
500
20
10
500
25
13
520
Register Name: SSR
Register Description: Signal Status
Access: R/W
Bit 7
0
8-Bit Hex Address: 2F
Default Value: 00
Bit 6
0
Bit 5
0
Bit 4
0
Bit 3
A1284
Bit 2
nInit
Bit 1
HstBsy
Bit 0
HstClk
Register Name: ZDR
Register Description: Zero Detect
Access: R/W
Bit 7
0
8-Bit Hex Address: 2C
Default Value: 00
Bit 6
0
Bit 5
0
Bit 4
0
Bit 3
A1284
Bit 2
nInit
Bit 1
HstBsy
Bit 0
HstClk
Register Name: RCR
Register Description: Reset Command
Access: R/W
Bit 7
Bit 6
1
8-Bit Hex Address: 05
Default Value: 00
Bit 5
0
Bit 4
0
Bit 3
0
Bit 2
0
Bit 1
0
Bit 0
1
0
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