Technical information

CX400 Technical Manual (Rev 1.00)
SATO /ARGOX Technical Documentation
Confidential Information
37
FLASH memory (U8,U9)
Two ”one M bytes FLASH ROM” ( SMD Type, Total size is 1 M x 16 bit )are put on the main board to store the
firmware, character and bar code fonts.
DRAM (U10)
An one M word EDO DRAM( 1 M x16 bits) is put on the Main Board. Normally the volatile data, like working
buffers and Parameters, are allocated here. The controlling signals for EDO DRAM are provided by the DRAM
controller built in SH -7034.
EEPROM (U7)
EEPROM is the memory device to save the parameters, which could be set by user and should be permanently
retained. The total size of EEPROM on board is 1024 bit ( 128Byte ).
RS232 Tranceiver (U4)
To convert the serial port signal to/from micro-controller to RS232 voltage level .
CENTRONICS interface (U13)
The data come from the Host (LPT Port On PC) are latched in U13(74374) then read out by the Micro-controller.
Output Ports (U11,15)
These output ports in U11& U15 are for controlling Motor, LED, Media Sensor, 24 V Relay and PE & Fault of
Centronic.
DC/DC converter (U20,L1,D2)
A regulator to convert 24 V DC to 5 V DC as the Vcc source for the most of components on main board.
Motor Driver (U16,17 )
These 2 ICs on U16,17 provide the mechanism to control and drive a bipolar stepping motor with chopper
control of the phase current. Stepping Motor can be smoothly and properly driven forward/backward rotation by
controlling “the Current levels & Driving Phase” in these 2 Driver IC.
Relay (RY2)
In order to prevent the Print Head from being damaged by the unknown state in Strobe, Data-In, Clock. … of Print
Head, when the printer is switched on , 24 V DC should be definitely disconnected from Print Head. RY2 provides
the mechanism to disconnect “24V” with Print Head during the transient period while power being on .
For printing. image, 24 V must be applied to Print Head by controlling this Relay.
Extension slot (JP11)
This slot is designate for the connection of all the optional extension modules.
Config. Jumper ( JP 7 )
System Configuration Jumper
Booter/Normal (JP5 )
If JP5 being set at “Normal” position, the program on the FLASH ROM(U8,U9) will be executed after power reset. On the
other hand, the Program on Expansion Board will be executed firstly after power on when JP5 being set at “BOOTER” position.
In case the program & data on Flash ROM (U8,U9 ) are corrupted completely( even the data in boot sector are corrupted too) ,
the program on expansion board can be executed by CPU to upgrade a new program into on-board Flash ROM while JP5
being “BOOTER” position.
Normally JP5should be set at NORMAL position to run the program fetched from On-Board Flash ROM.