IBM SUREMARK TI8 - Manual (Page 111)

Memory units
Random access memory (RAM) is used for storing the image data for the thermal
print head and program code. It is also used for storing incoming data from the
communication port.
Flash memory is used for many purposes, including:
v Character set storage (80 KB)
v Personalized message storage (8 KB)
v Logo or APA message storage (64 KB)
v Flash memory data storage (104 KB on standard printers, 1.9 MB on printers
with the 2 MB memory option, 8 MB on printers with the 8 MB memory option)
v Program code and resident character sets (256 KB) (except Models TI8 and TI9)
v For Models TI8 and TI9, 1.25 MB is available for all uses.
Personalized messages are those messages that are printed on each receipt in a
POS environment. Storing these messages in the flash memory greatly reduces the
data transmission time to the printer and the processing time of that data by the
microprocessor. This is also true of graphics or APA messages, which require a
significant amount of transmission and processing time.
Flash memory can also be used as a storage place for customer data. This data
could be journal data.
Immediate commands
The SureMark printer has 4 KB of memory on Models TI1 and TI2, and 16 KB of
memory on Models TI3, TI4, TI8, TI9, TG3, TG4, TG8, TG9, TF6, and TM6 to store
incoming commands and data.
Most commands are received and then executed sequentially. However, several
commands execute immediately upon receipt. These commands are:
v “Download graphics (logo) commands” on page 115
v “Predefine messages” on page 117
v “Download user-defined characters” on page 118
v “Extended address command-request printer ID” on page 112
v “Real-time requests” on page 175.
Voltage conversion circuitry
The printer requires two voltages. The print heads and motors use +24 V dc.
Powering the logic circuitry requires +5 V dc. Printer input voltage is one of the
following:
Communication Mode Power Requirement
RS-485 +38 V dc and +5 V dc
EIA-232 +24 V dc
USB +24 V dc
Updated April 2, 2009
Appendix C. Technical information 89