2.1.7Operation Panel

The clock synchronization OPCLK of LSI is used to input the switch data and output the LED data through the operation panel control LSI (IC1: BU5148S).

LSI

OPTD

OPCK

NPA2

OPRD

OPTXD

 

 

77

 

 

OPCLK

Command

 

78

LED Driver

and Data

OPCLR-N

 

latch

 

80

 

 

 

OPRXD

 

 

79

 

 

 

 

+5V

 

 

Switch

 

 

controller

A 2-byte (15 bits + 1 even parity bit) command (OPTXD) is transmitted to the LSI (BU5148S) in synchronization with the OPCLK signal. The LSI decodes this command and when it is found to be legal, returns a 2-byte command response back to the LSI which includes data on Switch information, LED status, receive command ACK/NAK and 1 odd parity bit.

Any transmission errors found cause the command to be reissued after the transmission of the OPCLR-N signal.

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Oki 3391, Microline Printer, 3390 specifications LSI Optd Opck NPA2 Oprd Optxd Opclk

3390, Microline Printer, 3391 specifications

The Oki 3391 Microline Printer embodies precision and versatility, making it an essential tool for various business applications. Built with a range of powerful features, this dot matrix printer excels in environments that require consistent, reliable printing. The Oki 3391 is a member of the Oki 3390 series, renowned for its robust design and technological advancements.

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Overall, the Oki 3391 Microline Printer, part of the 3390 series, stands out for its speed, print quality, and durability. Its ability to handle various printing tasks while providing consistent performance makes it an invaluable asset for businesses that value efficiency and reliability in their document processing. Whether printing multi-part forms or daily reports, the Oki 3391 delivers exceptional results, making it a top contender in the dot matrix printer market.