Section 1: Introduction
SATO CX400 Service Manual PN 9001110A Page 1-5
OPERATIONAL SYSTEMS
MicroController The SH7034 microcontroller utilizes a 16 bit external and
32 bit internal data bus based on the Hitachi SH1.
Flash Memory Has 2M bytes of Flash ROM located on the main board for
Firmware, character, and bar code font storage. The flash
ROM has a total size of 1M x 16 bit.
DRAM The 2 MB of DRAM is located on the main board. Volatile
data such as working buffers and parameters are
allocated here.
EEPROM On board memory is 128 Bytes.
RS232 Transceiver Converts the serial port signal to and from the
microcontroller to the RSR232C voltage levels.
Centronics Interface The data recieved from the host is transmitted to the
micro-controller.
Ouput Ports The ports control the motor, LED, media sensor, 24 volt
relay, and interface fault conditions.
Relay Removes the 24 volt supply to the thermal print head
during the transient period while the power is being
switched on. Otherwise the thermal print head may be
damaged.
Extension Connection Port Permits the connnection of all optional extension modules.
Configuration Jumper Selects the systems configuation.
Boot/Normal Is a two position switch that when in the normal position,
allows the program on the expansion board to be
executed only after the power has been reset. When in the
boot position, the boot program will be executed first. This
permits the CPU to reload a program into the on board
Flash ROM after complete corruption. The default setting
is in the normal position.
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