Samsung ML-2151N Especificaciones Pagina 33

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Service Manual
Summary of Product
4-16
Samsung Electronics
4.3.2 Memory part
>> Flash Memory
It stores the System Program.
Capacity: 2M Byte * 2
Access Time : 70 nsec
>>SDRAM
It is used as Swath buffer, System working memory area, etc. when printing.
Capacity: 32M Byte (Basic), upto 160M Byte (Option)
DIMM : 16MB / 32MB / 64MB /128MB
Type : SDRAM 100MHz/133MHz , 16bit
>>ROM DIMM
It supports the option ROM DIMM 1 Slot for supporting the expanding Memory.
Capacity : 8MByte (Max)
Access Time : 70nsec
4.3.3 RESET Circuit
After printer power is ON and 50~200 ms are passed, the reset signal from RESET IC (XC61FN3112MR) resets various
IC such as the CPU, Memory, etc. to prevent malfunction of the set by setting the initial value of port.
4.3.4 ClOCK Circuit
Basically, it consists of the Crystal (12.5MHz) and Capacitor (27pF) which is connected to the crystal in parallel, and it is
inputted to the MCLLK_Signal via the CY25814. The purpose of the adding SY25814 is substitution of EMI.
4.3.5 INTERFACE Part
>>IEEE1284
It supports the IEEE 1284 B Type Connection, and the protocol supports the IPP, ECP, Compatibility, Byte, and Nibble
mode.
>>USB2.0
USB2.0 Compliant, 480Mbps 1 port
>>Network
Option : Ethernet 10/100 Base TX
Protocol : SPX/IPX, TCP/IP,Appletalk, SNMP, HTTP 1.1, DLC/LLC
>>Panel
LCD : 16Char. * 2 Line / Back-light(Yellow)
Key : 9 Key
LED : 3 LED
The UART method is used for the controller and panel interface, and the HR 48C50 Holtak Micom is used
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