Appeal No. 2004-0297
Application No. 09/265,451
designates a fourth operation for a fourth account
(e.g., account data for a second bank).
Addition key 12 is used as a "next" key for
advancing the display state of liquid crystal display
section 4, and for mode-selection; subtraction key 13 is
used as a "back" key for restoring display section 4 to
its previous display state; and equal key 17 serves a
dual purpose, being the used as "yes" key and also as
the initialization key (power-on key).
Embossed data (not shown) is formed at a
predetermined position of the rear surface of card main
body 1 as card holder data.
FIG. 2 shows a circuit arrangement of the
integrated circuit shown in FIG. 1. Communication
control circuit 21, reset control circuit 22, and power
source control circuit 23 are connected to contact
section 3. In addition, battery check circuit 24 for
checking whether the voltage of battery 6 is more than a
predetermined value or not is connected to power source
control circuit 23. Internal bus 38 is connected to
program memory 28 for storing a control program, working
memory 29 used for arithmetic operations, data memory 30
consisting of a nonvolatile memory such as an EEPROM for
storing transaction data, timer circuit 31 used when
time is counted during program execution, and timer
circuit section 32 for generating time-piece data
including time data and date data. This timer circuit
section 32 includes timer circuits 322 and 323, and
frequency divider 311. Oscillator 33 having a frequency
of 32.768 kHz is connected to timer circuit section 32.
Display section 4 is connected to internal bus 38
through display control circuit 34 and display driver
35. Keyboard 5 is also connected to internal bus 38
through keyboard interface 36. In addition,
confirmation data generating circuit 37 for generating
the confirmation data of the input transaction data
using key data based on DES (Data Encryption Standard)
and CPU (Central Processing Unit) 27 for controlling the
entire circuit shown in FIG. 2 are connected to internal
bus 38.
Communication control circuit 21 is operated in the
on-line mode. More specifically, serial data supplied
from the terminal equipment (not shown) through contact
section 3 is converted into parallel data and output to
5
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007