參數(shù)資料
型號: UPD31172F1-48-FN
廠商: NEC Corp.
英文描述: VRC4172TM COMPANION CHIP FOR VR4121TM
中文描述: VRC4172TM伴侶芯片VR4121TM
文件頁數(shù): 30/44頁
文件大?。?/td> 278K
代理商: UPD31172F1-48-FN
Data Sheet U14388EJ2V0DS00
30
μ
PD31172
(10) IEEE1284-compliant parallel interface parameters
(a)
Parallel port control signal output
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
Parallel interface internal clock frequency
t
CLK1284
24
MHz
CD (7:0) output delay time (writing to DATA register)
t
1
30
ns
INIT#, STROBE#, AUTOFEED#, SELECTIN# setup time
t
2
4 T
ns
DIR1284 setup time
t
3
5 T
ns
Remark
T: Parallel interface internal clock cycle (41.6 ns (MIN.))
IOW# (input)
CD (7:0)
(I/O)
DIR1284
(output)
INIT#, STROBE#,
AUTOFEED#,
SELECTIN#
(I/O)
t
1
t
2
t
3
(b)
Compatible mode using FIFO
Parameter
Symbol
Conditions
MIN.
MAX.
Unit
CD (7:0) setup time
t
4
24 T
ns
STROBE# pulse width
Note 1
t
5
24 T
ns
BUSY response time
t
6
12 T
ns
CD (7:0) hold time
Note 2
(from STROBE#
)
t
7
24 T
ns
CD (7:0) hold time
Note 2
(from BUSY
)
t
8
0
ns
STROBE# setup time
Note 3
t
9
24 T
ns
Notes 1.
When there is no reaction from BUSY at a low level, STROBE# continues to output a low level.
2.
Data is held while BUSY is high level.
3.
When the FIFO buffer is empty, this signal is held at a high level.
Remark
T: Parallel interface internal clock cycle (41.6 ns (MIN.))
STROBE#
(output)
BUSY
(input)
t
4
t
5
Valid data
t
7
t
6
t
8
t
9
CD (7:0)
(output)
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