參數(shù)資料
型號(hào): PACS1284-06QT
廠商: California Micro Devices Corporation
英文描述: P/ACTIVE IEEE 1284 ECP/EPP TERMINATION NETWORK
中文描述: P /有源符合IEEE 1284支持ECP / EPP終端網(wǎng)絡(luò)
文件頁數(shù): 5/7頁
文件大?。?/td> 114K
代理商: PACS1284-06QT
2004 California Micro Devices Corp. All rights reserved.
06/07/04
430 N. McCarthy Blvd., Milpitas, CA 95035-5112
Tel: 408.263.3214
Fax: 408.263.7846
www.calmicro.com
5
PACS1284
Application Information
Termination Considerations
The IEEE 1284 specification requires both termination
and EMI filtering on a total of 17 signal lines. Control
and Status lines (8 in total) only require a pull-up resis-
tor and a filter capacitor. The Data lines and Strobe
also require a series termination resistor in addition to
the pull-up resistors and filter capacitors. See
Table 1
,
in conjunction with the schematic diagram on page 1.
Interfacing to IEEE 1284 Connectors
IEEE 1284 defines three interface connectors:
1284 A is a 25-pin DB series connector which is
the de facto PC standard for the host connection.
1284 B is a 36-pin, 0.085 inch centerline connector
used on the peripheral device.
1284 C is a new 36-pin, 0.050 inch centerline con-
nector which can be used for both host and periph-
eral.
Figure 2A
shows a possible hook-up between the
1284-A connector on a PC motherboard and the
PACS1284, illustrating how the pin configuration of the
PACS1284 allows for easy interconnect between the
two. The dotted I/O signals of the PACS1284 will
typically be connected to a Super I/O chip on the
motherboard.
Figure 2B
shows a possible hook-up between the
1284-B connector on a peripheral and the PACS1284.
Figure 2C
shows a possible hook-up between the
1284-C connector and the PACS1284.
Figure 2. Example Connections of IEEE 1284 Connectors with PACS1284
Table 1: IEEE 1284 Termination Requirements
SIGNAL TERMINATION REQUIREMENTS
Signal Name
Series Termination
Data1 - Data8
Yes
Strobe
Yes
Init
Not Required
AutoFeedXT
Not Required
Selectin
Not Required
ACK
Not Required
Busy
Not Required
Paper Empty
Not Required
Select
Not Required
Fault
Not Required
1
14
1
1
9
1
1
1
1
2
20
= V
CC
= GND
= V
CC
SUPER 12
4
PACS1284
SUPER 12
PACS1284
SUPER 12
PACS1284
12
8
4-A Connector
Host
12
8
4-B Connector
Peripheral
12
8
4-C Connector
Host/Peripheral
25
13
36
18
36
18
1
9
Figure 2A:
Figure 2B:
Figure 2C:
= GND
相關(guān)PDF資料
PDF描述
PACS1284-04Q P/ACTIVE IEEE 1284 ECP/EPP TERMINATION NETWORK
PACS1284-06QR P/ACTIVE IEEE 1284 ECP/EPP TERMINATION NETWORK
PACSZ1284-01Q P/ACTIVE IEEE 1284 ECP/EPP TERMINATION NETWORK
PACSZ1284-01QR P/ACTIVE IEEE 1284 ECP/EPP TERMINATION NETWORK
PACSZ1284-02Q P/ACTIVE IEEE 1284 ECP/EPP TERMINATION NETWORK
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