2.3.1 Logic
Components
[ 1 ]
CPU
CPU (U12) controls and manages the entire system, which is 32bit microcomputer of
NEC brand.
[ 2 ]
Flash ROM
One 32M-bit flash ROM is used, where the program, font and downloaded data are
stored.
[ 3 ]
SDRAM
One 64M-bit SDRAM is used. It is used when the program is executed, and when
the received data is stored temporarily.
[ 4 ]
EEPROM
One 4Kbit EEPROM (U3) is used. This memory is used for write and storage of
baud rate information, Vendor ID code, Product ID code and mechanical information.
If the main PCB is replaced, it is needed to write the serial number printed on the
EEPROM mounted on the main PCB and the mechanical configuration date.
For this operation, refer to “APPENDIX 1. MAINTENANCE SOFTWARE
OPERATION”.
II- 10
