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参数资料
| 型号： | DS1410E |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | Parallel Port Adapter(并行端口适配器) |
| 中文描述： | SPECIALTY MICROPROCESSOR CIRCUIT |
| 文件页数： | 3/7页 |
| 文件大小： | 43K |
| 代理商： | DS1410E |
DS1410E
021798 3/7
PRINTER COEXISTENCE
In order to coexist with parallel port printers, the
DS1410E utilizes output pins 11 and 13 and input pins
11 and 13. When input pin 14 is low these pins are used
for transmitting data received on the I/O pin or for issu-
ing an unmistakable busy signal. When input pin 14 is
inactive (high) input pins 11 and 13 propagate the states
of output pins 11 and 13.
If a printer is attached to a DS1410E, output pin 11 is
connected to the printers BUSY signal (low only if printer
is on–line and busy), and output pin 13 is connected to
SELECT OUT (driven low if printer is off–line), see
Figure 2.
If the attached printer is “powered up” and on–line, the
DS1410E uses SELECT OUT for communication
regardless of the state of the printers BUSY signal. If the
printer is off–line its BUSY signal is inactive (high) and
this line is used by the DS1410E for host communica-
tion.
If the attached printer is powered off, both SELECT OUT
and BUSY will be low. This prevents meaningful com-
munication with the DS1410E because it is unable to
de–assert its busy signal (input pins 11 and 13 low) or
return a high sample of the I/O pin.
To solve this problem, the DS1481 uses the busy signal
issued during a reset to detect the presence of another
DS1481 based device attached behind it on the parallel
port. If this busy signal is not detected by the DS1481, it
assumes that it is the last DS1481 based device on the
port.
If the DS1410E determines that it is the last device on
the port it ignores the states of output pins 11 and 13
while input pin 14 is low. It also leaves the output pin 14
high to prevent sending line feed signals to the printer.
This gives the last device the ability to control input pins
11 and 13 without affecting stackability.
HOST INTERFACE TIMING DIAGRAMS
Figure 1
INPUT PIN 14 (ENI)
INPUT PIN 11 (O1/BSY1)
INPUT PIN 2 (D/CLK)
VALID
VALID
INPUT PIN 3 (RES)
INPUT PIN 13 (O2/BSY2)
READ 0 (I/O)
READ 1 (I/O)
WRITE 1 (I/O)
t
SIO
t
BLB
t
SIO
= 8
μ
s (TYPICAL), t
BLB
= 60
μ
s (MINIMUM) (OD = 0
t
SIO
= 2
μ
s (MAXIMUM), t
BLB
= 6
μ
s (MINIMUM) (0D = 1)
READ 0, READ1, WRITE 1 BIT TIME SLOTS
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1410E-001 | 功能描述:界面开发工具 RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| DS1410E-GSI | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| DS1410K | 功能描述:界面开发工具 RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| DS1411 | 功能描述:iButton配件 RoHS:否 产品:iButton Probes 用于:DS19xx Series 制造商:Maxim Integrated |
| DS14-11 | 制造商:FLOWLINE 功能描述:EchoPod Ultrasonic Lvl Switch G,1.25m, FOB |
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