Rev. A Product Overview Appendix D-43
TM-H6000/H6000P Service Manual
Confidential
Memory Circuit Board
An outline of the memory board configuration and specifications is provided below.
❏ Program ROM (Flash memory, U508)
❏ Font ROM (Flash memory, U513)
❏ Volatile RAM (SRAM, U509)
❏ EEPROM for Future Expansion (Electrically erasable NAND memory, U512)
Program Updates
Program uploads can be performed over communication lines (via the interface board).
TableD-2 Program ROM specifications
Item Specification
Application Mainly for storage of programs
Capacity Standard: 4 Mbit
8 Mbits may be used, depending on specifications. Circuit also is compatible with
16 Mbits (reserved)
Access Speed 70 ns
TableD-3 Font ROM specifications
Item Specification
Application Mainly for storage of fonts
Capacity Standard: 4 Mbit
8 Mbits may be used, depending on specifications. Circuit also is compatible with
16 Mbits (reserved)
Access Speed 70 ns
TableD-4 Volatile RAM specifications
Item Specification
Application Receive buffer
Print buffer
Capacity 1 Mbit
Circuit also is compatible with 2 Mbits (reserved), which can be used as external
memory.
Access Speed 55 ns
Other SRAM is used.
Flags and stacks use CPU internal RAM (256 bytes)
TableD-5 Specifications for the EEPROM for future expansion
Item Specification
Model TC5816BFT (Toshiba) etc.
Firmware Support Not determined
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