1. Mini Project Presentation
Design of Automated Teller Machine
Controller

2. Aim of the Project
Design of Automated Teller Machine Controller

3. Objectives of the Project
 To review the literature for understanding the Automated
Teller Machine Controller realization for RTL Modeling
 To arrive at the design specifications for architecture based on
reviewed literature for intended application
 To design Verilog module for controller and perform
behavioral simulation
 To Synthesis the design using the FPGA flow and perform
implementation

4. Methods and Methodology
Verilog model will be developed for selected architecture
Functionality of the design will be verified using test
bench in Modelsim
Performance of the design with the required specifications
will be compared
Synthesis will be performed and the gate level net list will
be generated using Xilinx

5. ABSTRACT
In the growing technological world, people want their work
to be very simple in order to save their time. As we know
some new technology is becoming popular in banking sector,
which is referred as ATMs. It makes the work of people as
well as the banking sectors to be easy. ATMs help in
providing money to the people nearer to the living area by
saving their time so that it becoming very popular.
In this work the development of a Moore machine state
diagram of an ATM controller.

6. . The developed design will be modeled using Verilog
HDL language which is a Hardware Description
Language (HDL) used to describe a digital system. The
verification of developed model will be made by
identifying the suitable test cases in a test bench. The
simulation will be carried out using Modelsim tool and
the intended functionality can be verified with the help
of its simulation results and also it can be synthesized
using the Xilinx tool.

7. LANGUAGES USED AND TOOLS
VHDL/Verilog HDL
TOOLS REQUIRED:
MODELSIM – Simulation,
 Xilinx - Synthesis

9. Basically an ATM (Automated Teller Machine) is the
combination of hardware and software. The hardware used is
card swiper, keypad, display, etc. The software such as
operating system controls this hardware’s. Now a day’s
digital system is entered in replacing the software.
An automated teller machine (ATM) is a computerized
electronic device that helps the customers of a financial
institution to access the financial transactions in a public
place without any help from others.
ATMs have moved away from custom hardware
architectures using microcontrollers and/or application-specific
integrated circuits to adopting a hardware
architecture that is very similar to a personal computer.

10. Simple ATM Networking
Bank Computer Host Computer ATM
Telephone network Telephone network

11. ATM accesses the bank account through telephone
networking, a host processor and a bank computer to verify
the data. All the operations of ATM are in synchronization in
reference to a common clock source. In case of any
misconnection between the process steps, the whole
transaction is rolled back to effect no change in the account
status.
The ATM Controllers are working on windows based
operating systems, which also provide ease to designers for
programming and modeling its operation. ATM controllers
are sophisticated chip elements designed and programmed to
make the transaction simple and user-friendly

12. Block Diagram of ATM Controller
Control
State Machine
Signal Flow
Data Flow
CardScanned
Card Swiper
4
CardNumber PIN
4
PIN Parser
4
Fund Checker
Entered Amount Parser
AccountNumber
IPINcountCheck
DepositSelected
NOselection
OverflowUnderflow
enterWAmount
TransactionValid
CancelTransaction
Key{0,1,C,E}
Note : Clock and power from the common source is fed to all the blocks and modules.
Key
Pad
MEMORY
Display
LUT
(Look up Table)
Card Information Storage
Module
Transaction Verifier
3
4
2
16 16
16 16
16
16
16
16
16 16
16
CardPIN
AccountNum
PINentered
enterPin
Key
Ente
red
Key {0,1,C,E}
Tran
sacti
onS
elec
ted
Amo
untE
nter
ed
CheckStatus
StoreAccNum
LockStatus
PINequality
whichOption
oldBalance
AmountOut
enterDAmount
newBalance
verify
Req
Write
Lock
ReqDone
welcome
Inva
lidTr
ansa
ctio
n
anyt
hing
Else
Key {E,W,C}
Key {0,1}
Keystroke codes
C : Clear
E : Enter
W : Withdraw
ATM Controller

13. To summarize the operation, the ATM controller is
activated on swipe of a card at the card swiper. It then
checks its lock status and asks to enter the PIN only when
unlocked.
User has to enter the correct PIN within three trials, after
which ATM corresponds with the memory to lock the
account and no further transaction on the account is
possible. On getting the PIN matched, user is asked for
the option for the operation he wants to do. For both
withdrawal and deposit, he is been provided with the
current balance of the account and asked for the
transaction amount.

14. General Flow Of ATM Process

15. Flow-chart for One session

16. Flow Chart For One Transaction

17. Basic Block Diagram for ATM Controller System

18. Card Information Storage Module

19. PIN PARSER

20. Fund Checker

21. ENTERED AMOUNT PARSER

22. Transaction Verifier

23. STATE DIAGRAM

24. Basic steps for simulating a design
in ModelSim

25. XILINX Implementation Design Flpw
Chart

26. Simulation Results….

27. Simulation results continued//

28. Continued.//

29. Continued…

30. Continued results…

31. RTL Schematic Of Basic Input and
Output

32. FPGA Floorplan Editor

33. THANK YOU