DC465A - Demo Manual

DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
LTC1955 Dual
Smart Card Interface
U
DESCRIPTIO
Demonstration circuit DC465 is configured to easily interface the LTC®1955 dual smart card interface to a personal
computer via an RS232 serial port. The demonstration
package includes a compact disk containing a user-friendly
graphical interface program. RS232 commands are interpreted by the MC68HC711E9CFN2 microcontroller and
sent on to the LTC1955. A simple interface language
, LTC and LT are registered trademarks of Linear Technology Corporation.
ARY
I
F
N
O
U W
CONDITIONS
C
Y
N
A
P
M
O
VBATT Input Voltage Range
VBATT Supply Current
VBATT = 3.6V, ICCA = ICCB = 0mA, VCCA = VCCB = 5V
VBATT Shutdown Current
VBATT = 3.6V, VCPO = 0V
VALUE
2.7V to 5.5V
390µA
1µA
C
C
T
L
DVCC Input Voltage Range
3V to 5.5V
DVCC = 3.6V, Serial Port Unconnected
5mA
U
U W
DVCC Supply Current
L
A
I
T
DEN
WW
PERFOR A CE SU
PARAMETER
(ICCICL) is permanently programmed into the
microcontroller and is summarized in Appendix A. The
demonstration circuit operates on a 3V to 5.5V input
supply. To begin evaluating the LTC1955 using demo
circuit DC465 see Getting Started in the Quick Start Guide
section.
TYPICAL PERFOR A CE CHARACTERISTICS A D BOARD PHOTO
Deactivation Sequence
DC465 with Two Smart Cards
dc465f
1
J1
SYNC
PIN 1
TOP VIEW
9 10 11 12 13 14 15 16
13
14
5
11
10
12
R11
0Ω
9
9
4
8
R10
0Ω
8
3 TD
7
6
5
4
3
2
1
7
C5
0.1µF
24 FAULT
DR2IN
DR3IN
RX5OUT
DREN
RXEN
GND
RX2IN
RX3IN
RX4IN
DR3OUT
RX5IN
RX3OUT
RX4OUT
RX1IN
DR2OUT
RX2OUT
C1–
DR1OUT
DR1IN
RX1OUT
VCC
C1+
15
16
17
18
19
20
21
22
23
24
25
27
28
26
C3 –
C3+
C2+
C2 –
V–
LTC1348CG
17 VCCB
18 CLK B
19 RST B
20 I/O B
21 PRES B
22 NC/NO
C8
0.1µF
C3
0.1µF
DVCC
23 UNDERV
V+
U2
UH PACKAGE
32-LEAD PLASTIC QFN
C6
0.1µF
SGND
C7
6
0.1µF
2 RD
1
ASYNC
PGND
VCCA 8
RIN
C–
CLK A 7
DATA
SVBATT
RST A 6
DOUT
PVBATT
I/O A 5
DIN
C+
C8A 3
LD
NC
C4A 4
SCLK
CPO
PRES A 2
C11
0.1µF
R4
47k
21
20
JP2
PRGM
R5
47k
2
C2
0.1µF
SW1
R6
100Ω
E4
VP-P
1
4
RESET
RST
U3
MC38HC711E9N
DVCC
PC0
(IC3)PA0
PB0
PB1
(2MHz)E
(SS)PD5
(SCK)PD4
PD1(TXD) (MISO)PD2
PD0(RXD) (MOSI)PD3
51
2
1
18
VRH
32 31 30 29 28 27 26 25
IRQ
19
XRQ
26
MODB
VRL
R12
12.4k
1%
3
4
5
R7
47k
3
4
42
34
U5
GND
VCC3
VCCA VCC18
GND
RST
U1
4
5
25
31
32
30
29
5
8
7
6
5
28
26
7
6
27
8
2
1
FAULT 24
LED1
IN121CAL
FAULT
C4
0.1µF
R2
180k
LTC1728ES5-1.8
C18
0.1µF
2
Figure 1
LTC1799CS5
SET
DIV
OUT
3
2
1
R9
1k
1
DVCC
RN2
10
V+
2
41
9
4
1
25
5
2
3
22
24
1
RN1
10
R8
47k
R1
47k
23
17
2
3
DVCC
5V
R3
261k
VBATT =
DVCC
1
ASYNC
LD
SCLK
DOUT
DIN
FAULT
SYNC
DATA
RIN
U4
LTC1955
EUH
VBATT
3
DVCC
RST B
I/O B
PRES A
VCCA
CLK A
RST A
I/O A
C4A
C8A
C1
4.7µF
6.3V
0805
19
20
2
8
7
6
5
4
3
2 EXT
VBATT VBATT
JP1
VBATT
57
VDO
VSS
1
C14
1µF
6.3V
C15
4.7µF
6.3V
0805
GND
PRES B
VCCB
CLK B
GND
1
C–
11
MODA
3
UNDERV
C
14
EXTAL
7
12
CPO
15
XTAL
8
23
DVCC
13
VBATT
NC/NO
22
GND
9
C
C
T
L
Y
N
A
P
M
O
I
F
N
CO
33
21
17
18
L
A
I
T
DEN
10
2
C12
4.7µF
6.3V
0805
C9
4.7µF
6.3V
0805
E3
VBATT
2.7V TO 5.5V
E2
GND
E1
DVCC
3V TO 5.5V
C13
0.1µF
C10
0.1µF
C8
S2
S1
C5
C1
C3
C2
C7
C4
C8
S2
S1
C5
C1
C3
C2
C7
C4
S2
S1
C5
C1
C3
C2
C7
C4
C8
DC465 Schem
J3
AMPHENOL
C702-10MDD8-121-4
S2
S1
C5
C1
C3
C2
C7
C4
C8
J2
AMPHENOL
C702-10MDD8-121-4
U
W
DVCC 1
PACKAGE A D SCHE ATIC DIAGRA
W
LTC1955
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
dc465f
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
PARTS LIST
REFERENCE
QUANTITY
PART NUMBER
DESCRIPTION
JMK212BJ475MG
4.7µF 6.3V X5R Capacitor
VENDOR
C1, C15
2
C2–C8, C10, C11, C13, C16
11
0603YC104MAT1A
0.1µF 16V C7R Capacitor
AVX
(843) 946-0362
C9, C12, C14
3
JMK107BJ105MA
1µF 6.3V X5R Capacitor
Taiyo Yuden
(408) 573-4150
E1, E2, E3
3
2501-2
0.094" Turret Testpoint
Mill-Max
(516) 922-6000
E4
1
2308-2
0.064" Turret Testpoint
Mill-Max
(516) 922-6000
JP1
1
2802S-03-G1
0.079cc 3-Pin 1-Row JMP
Comm-Con
(626) 301-4200
JP2
1
2802S-02-G1
0.079cc 2-Pin 1-Row JMP
Comm-Con
(626) 301-4200
Shunts for JP1, JP2
2
CC1J2MM-138G
0.079" Center Shunt
Comm-Con
(626) 301-4200
J1
1
DR-E9SB-NJ000-S0007
DB9F R-Angle Conn CON-DB9R
Signatron
(909) 464-1883
J2, J3
2
C702-10M008-121-4
10P Smart Card Connector
Amphenol
LED1
1
LN1261CAL-(TR)
Bright Red LED
Panasonic
RN1, RN2
2
CRN16-4V-100JAM
10Ω Res 2x4 Array ISO Chip
R1, R4, R5, R7, R8
5
CR16-473JM
47k 1/16W 5% Chip Resistor
R2
1
CR16-184JM
180k 1/16W 5% Chip Resistor
R3
1
CR16-244JM
240k 1/16W 5% Chip Resistor
R6
1
C
Y
N
A
P
M
O
R9
1
R10, R11
2
R12
1
SW1
U1
U2
C
C
T
L
1
1
1
Taiyo Yuden
TELEPHONE
D
I
F
N
O
L
A
I
T
EN
(408) 573-4150
(201) 348-5217
AAC
(714) 255-9186
AAC
(800) 508-1521
AAC
(800) 508-1521
AAC
(800) 508-1521
CR16-101JM
100Ω 1/16W 5% Chip Resistor
AAC
(800) 508-1521
CR16-102JM
1k 1/16W 5% Chip Resistor
AAC
(800) 508-1521
CJ06-000M
0Ω 1/16W 5% Chip Resistor
AAC
(800) 508-1521
CR16-1242FM
12.4k 1/16W 1% Chip Resistor
AAC
(800) 508-1521
Panasonic
(201) 392-4511
EVQ-QWS02W
Micropushbutton Switch
LTC1728ES5-1.8
IC SOT-23-5
LTC
LTC1348CG
IC SSOP-28G
LTC
U3
1
MC68HC711E9CFN2
IC PLCC-52
U4
1
LTC1955EUH
IC 5x5 QFN-32
LTC
U5
1
LTC1799CS5
IC SOT-23-5
LTC
For MTGS at 4 Corners
4
For MTGS at 4 Corners
4
#4-40 1/4" Screw
14HTSP003
#4-40 1/2" Nylon Hex Standoff
Motorola
(800) 441-2447
Any
Micro Plastics
(870) 453-8861
Notes: Unless otherwise specifed
Note 1: All resistors are in ohms.
Note 2: Install shunts on JP1 Pin 1 and 2, JP2 Pin 2 and 3.
Note 3: Install four standoff components on bottom side.
dc465f
3
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
QUICK START GUIDE
SYSTEM REQUIREMENTS
On the General tab change the settings to:
• PC with a 486 processor or higher and serial port
mapped to COM1
Timeout (sec)
0.1
Live Mode:
ON
• Microsoft Windows 95 or higher
Byte Ordering
MSB
• CD-ROM drive
On the Serial tab ensure that the settings are:
• PC keyboard
Baud Rate:
9600
• 9-pin male-female serial cable (straight through connection)
Character Size:
8
Stop Bits:
1
Parity:
None
• A bench power supply or battery pack capable of
producing 3V to 5.5V at up to 250mA of current.
L
A
I
T
DEN
Handshake:
GETTING STARTED
None
Receive Buffer Size: 4096
The software must be installed on a personal computer
before the demonstration board can be evaluated. Follow the software installation instructions below.
Software Installation
Y
N
A
P
M
O
C
C
T
L
• Insert the compact disk labeled LTC1955 into an
appropriate CD-ROM drive on the PC.
• Access the CD-ROM drive, double click the link
SETUPRT.BAT and follow the instructions until the
HP VEE RUNTIME libraries are installed.
I
F
N
CO
Click [OK]
Click [OK]
Click [SAVE CONFIG]
Hardware Connections
• Connect the 9 pin male-female serial cable from the
PC serial port (COM1) to the demonstration board.
• Ensure that Jumper JP1 is in its VBATT = DVCC
position (connecting terminals E1 and E3).
• Access the CD-ROM drive, double click the link
SETUPIO.BAT and follow the instructions until the
HP VEE IO libraries are installed.
• Apply 3.2V to 5.5V from “VBATT” to “GND.”
• From the Start Menu of the personal computer select
“Run…”. At the “Open:” prompt type:
“veerun –ioconfig” and click the [OK] button.
• Access the CD-ROM drive and double click the program icon LTC1955.vxe. The demonstration program will appear on the screen. (See Figure 2.)
When the dialog box appears, click the [Add Instrument…] button.
• Insert a credit card or smart card into smart card
socket A. On the computer screen, the icon for smart
card socket A should indicate the presence of a card.
Ensure that the settings are:
Name:
SERIAL1955
Interface:
Serial
Address (eg 9)
1
Running the Program
• Using the software program, move the voltage slider
for card A to the 3V position. Measure VCCA with
respect to GND on the demonstration board and
observe that it is at approximately 3V.
Click on “Advanced IO Config…”
dc465f
4
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
QUICK START GUIDE
L
A
I
T
DEN
Y
N
A
P
M
O
I
F
N
CO
C
C
T
L
Figure 2
dc465f
5
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
U
OPERATIO
The graphical interface program, LTC1955.vxe, can be
used to perform extensive evaluation of the LTC1955. It
can be used to set the voltage on both card channels to
1.8V, 3V or 5V as well as the clock divider modes for both
channels. By using the SELECT, DATA and RIN controls it
can manipulate the I/O and RST pins of both smart card
sockets. If an EMV compliant asynchronous smart card is
inserted into one of the sockets, its answer to reset can be
retrieved. Finally, it provides status indicators showing the
state of each smart card channel. There are indicator icons
for card detection, VCC status, electrical fault status and
ATR fault status. The program can be iterated in an infinite
loop or it can be switched to single-step mode.
Looping vs Single-Stepping the Program
As mentioned above, the graphical interface program can
be looped continuously or operated in single-step mode.
For the following sections, the program should be left in
LOOP mode unless otherwise noted (it will automatically
start in this mode). The LOOP-STEP slider in the lower
right corner of the program window controls the mode of
the program. If the slider is switched to STEP mode then
only a single read/write cycle to the LTC1955 is performed
with each press of STEP/CONTINUE.
Y
N
A
P
M
O
C
C
T
L
LOOP mode is indicated by the clockwise arrow to the left
of the LOOP-STEP control slider. When in STEP mode, a
pulse icon appears in this location.
Smart Card Detection
The smart card detection channels will indicate the presence of a card by changing the smart card icons in the
program window. When no card is present, the icon will
show “NO CARD.” When a card is present it will show
“CARD PRESENT.”
Hint: It is important to have a card in the socket for the
following sections. Setting a card voltage (other than 0V)
on an empty card socket will result in an automatic card
removal fault. Any standard credit card or even a reversed
smart card can be used to activate the card detection
switches.
Setting VCCA and VCCB
The VCC settings of both channels can be set quickly by
using the voltage sliders to the right of the smart card
icons. Simply manipulate one of the sliders from 0V to
1.8V, 3.0V or 5.0V. Use a voltmeter to confirm that the
VCCA/VCCB voltage at the smart card socket is correct.
Note: It is possible to change the slider from any setting to
any other setting using the software. However, if the slider
is moved from a lower voltage setting, (other than 0V) to
a higher voltage setting, a fault on that channel will likely
result. This is due to both an undervoltage and overcurrent
condition on that channel. All settings should start from
the 0V position. If a fault does occur, it can only be cleared
by returning the slider to the 0V position. Changing from
a higher voltage setting to a lower voltage setting will
generally not result in a fault.
L
A
I
T
DEN
I
F
N
CO
Setting the LTC1955 Clock Modes
Once a smart card socket is activated at one of the three
VCC levels its clock speed can be easily changed. Using an
oscilloscope, observe the CLK A/CLK B pin of a given
channel. With the clock setting slider set to CLK ÷ 1 mode,
observe that the CLK A/CLK B pin is switching at precisely
2MHz. By moving the slider to CLK ÷ 2, CLK ÷ 4 and CLK
÷ 8 the clock frequency can be changed to 1MHz, 500kHz
and 250kHz respectively. By moving the control slider to
Stop Low or Stop High the CLK A/CLK B pins can be
stopped in either state.
Setting RST A and RST B
The RST pins of both channels can be manipulated by first
selecting a channel and then setting or clearing RIN. On the
right side of the main program window set the center slider
switch to either SELECT A or SELECT B. Above the
selection switch manipulate the RIN slide control to HI.
Observe with a voltmeter that the RST pin for the selected
channel has gone to its VCC level. Sliding the RIN control
back to LO will force the RST pin back to 0V. The other
channel can be manipulated similarly.
The RST latches on the LTC1955 can be demonstrated
using these controls. Once a channel is selected, its RST
pin follows the RIN slide control. If the other channel is
dc465f
6
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
U
OPERATIO
selected or neither channel is selected the RST pin will
ignore changes on this control and will remain in its
current state.
Asserting I/O A and I/O B
Retrieving an Answer to Reset
The demonstration board DC465 has the capability of
retrieving the answer to reset from an asynchronous card.
This is accomplished by the following steps:
1. Insert an asynchronous EMV or ISO7816 compliant
smart card in either socket
The I/O pins of both channels can also be easily manipulated. First a channel must be selected using the select
switch at the center-right of the main program window.
Once a channel is selected, its I/O pin will follow the state
of the DATA slider control. Note that the I/O pin for an
unselected channel will automatically return to the Z state
(high).
5. Move the LOOP-STEP slider to the STEP position
Detecting Card Removal Faults
6. Move the GET ATR slider to the ON position
Once a channel has been powered to 1.8V, 3V or 5V it will
indicate a card removal fault upon extraction of the card.
This can be demonstrated by powering up either channel
and simply removing the card. The fault will be cleared
when the voltage slider is moved back to 0V. Note that a
card removal fault is considered an electrical fault. It can
be distinguished from other faults such as short circuits
by observing both the fault status bit and the card detection bit in the LTC1955’s status word.
7. Push the STEP/CONTINUE button
LTC
Y
N
A
P
M
O
C
Detecting ATR Faults
The LTC1955 has an answer to reset counter to detect ATR
faults. An ATR fault can be detected by selecting an
energized channel and setting the RIN slider to HI. Notice
that without a real smart card in the socket the ATR
STATUS indicator for that channel switches to red. The
fault will be cleared in the LTC1955 by switching RIN back
to LO.
Detecting Electrical Faults
Electrical faults can be demonstrated in a number of ways.
Once a channel’s VCC is brought to 1.8V, 3V or 5V it can be
shorted to GND. Furthermore, short circuits on the CLK
and RST pins will result in an electrical fault. They can be
induced by shorting the CLK or RST pins to the supply
representing its opposite state (VCCA/B or GND) or by
shorting to the same potential and changing the state of
the pin using the software.
2. Set the voltage slider to the appropriate level for the card
3. Select the smart card using the SELECT slider
4. Ensure that the clock slider is set to CLK ÷ 1
L
A
I
T
DEN
I
F
N
CO
The answer to reset will appear in the output box at the
bottom left of the program window.
Separating VBATT and DVCC
For maximum flexibility the LTC1955 has two separate
supply levels. VBATT provides the main power to the chip
and DVCC is used as a reference level for the digital control
inputs and outputs. On demonstration board DC465, DVCC
provides power to the microcontroller as well as the
LTC1348 RS232 chip. While the LTC1955 will work with
DVCC levels as low as 1.6V these two chips need at least 3V
to operate correctly.
Jumper JP1 connects DVCC and VBATT. To experiment with
various VBATT levels simply remove the shorting bar from
JP1 and apply a separate supply to VBATT. VBATT is
specified down to 2.7V but will typically work below that
level if the LTC1955 is not asked to deliver significant
power. The undervoltage detection set point has been set
to approximately 2.93V and is detecting the DVCC line.
Advanced Evaluation Using ICCICL
The onboard microcontroller contains a very simple
LTC1955 control language known as ICCICL that can be
used to access the LTC1955 directly. ICCICL (interface
chip card interface command language) can be accessed
by a simple dumb terminal or with a personal computer.
With a personal computer, either a terminal emulation
program could be used or a dedicated program could be
dc465f
7
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
U
OPERATIO
written in a high level language such as BASIC to send
commands to the LTC1955. The demonstration disk contains a shareware terminal emulation program known as
Zebra103.
The RS232 port of the demonstration is board is configured for 9600 8-N-1.
The ICCICL command structure is documented in Appendix A. The commands consist of a single character. Some
commands will be followed by an argument of either 2 or
4 hexadecimal characters.
The simplest command is the question mark - ?. This
command doesn’t affect the LTC1955 but can be used to
determine if the demonstration board is working properly
and connected to the correct port of the personal computer. If all connections and settings are correct the
demonstration board will return the string “ICCICL” in
response to the ? command. No carriage or line feed will
be returned and the ? will not be returned. The cursor will
simply remain at the end of the ICCICL string.
Y
N
A
P
M
O
C
C
T
L
The most commonly used command will be the serial port
command (minus sign) –. The serial port command always needs to be followed by 4 hexadecimal characters.
These characters are translated into binary and sent directly to the LTC1955’s command register. For example,
to configure the LTC1955 for VCCA = 3V, card A selected,
I/O A connected to DATA and CLK A set to ASYNC ÷ 2 the
ICCICL command would be:
– BE00
To clear both ports of the LTC1955 the command would
be:
– 0000
Note: The command will not be echoed to the screen.
Upon entry of a serial port command, the LTC1955 status
word will be immediately sent to the screen. For example
if there is a card inserted into each socket and the command –0000 is given, the screen will show the following:
– 00008080
8080 shows that bits D15 and D7 are both 1. These bits
indicate the presence of the smart cards. Recall that the
– 0000 will not appear as it will not be echoed. Further-
more, as serial port commands are entered, the resulting
status data will appear on the screen without a carriage
return or linefeed.
As mentioned above, more sophisticated programs can be
used to write command data and receive status data from
the demonstration board using ICCICL. The program will
need to be able to communicate with the correct serial port
on the personal computer.
Using a Different Microcontroller
To experiment with different microcontrollers a separate
board containing the microcontroller will be needed. It can
be connected to DC465 by a ribbon cable or individual fly
wires. The onboard microcontroller can be disconnected
from the LTC1955 by removing resistor networks RN1 and
RN2 from the demonstration board. This can be accomplished by either carefully clipping their pins or by melting
their solder and carefully lifting them up. Their solder can
be melted by locally heating the board with a temperature
controlled heat gun set to approximately 600°F (351°C).
L
A
I
T
DEN
I
F
N
CO
Troubleshooting
The most likely problem with DC465 will be getting proper
communications with a host personal computer. Problems can arise from selecting the wrong port or having the
wrong protocol settings for the correct port. Note that on
most Windows based systems the physical serial port is
mapped to a logical port. For the LTC1955 graphical user
interface the port is COM1.
It is possible that the RS232 port of the computer is
connected for null modem. In this configuration the output
of the LTC1348 RS232 chip may be connected to the
output of the serial port and likewise the inputs may be
connected together. No damage will occur if the board is
connected but of course it will not function properly. The
simplest solution to this problem is to insert a null modem
adapter in series with the serial cable. These adapters
simply switch the TD and RD signals from the computer.
Alternatively DC465 is configured with series resistors
R10 and R11 that can be removed. Once they are carefully
removed, two small jumper wires can be tack soldered to
their pads to convert the board to the null modem configuration.
dc465f
8
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
U
OPERATIO
APPENDIX A
THE ICCICL INTERFACE LANGUAGE
Integrated Circuit Card Interface Chip Language (ICCICL)
NAME
SYNTAX ARGUMENTS COMMENTS
IDENTIFICATION
?
Returns the String “ICCICL” for Identification and Functional Testing.
There are no CR or LF Characters Transmitted.
SERIAL PORT COMMAND
-
GET ATR
\
Calls “Set RIN”
Calls “Receive Block”
RECEIVE BLOCK
<
Polls Smart Card I/O Pin for Up to ~9600 ETU per Character. After the Last Character is Received the
Entire Block is Returned Followed by a LF. Up to 32 Characters may be Received per Block.
SET RIN
!
Sets the RIN Pin of the LTC1955 High.
CLR RIN
@
Sets the RIN Pin of the LTC1955 Low.
abcd
Sends 4 Hex Characters to the LTC1955 Serial Port. “a” is the Most Significant Byte.
Returns 4 Hex Characters from LTC1955 Serial Port. No Termination Character is Returned.
L
A
I
T
DEN
I
F
N
CO
SET SYNC
#
Sets the SYNC Pin of the LTC1955 High. For Use with Synchronous Memory Cards.
CLR SYNC
$
Sets the SYNC Pin of the LTC1955 Low. This Will Only be Used on Synchronous Memory Cards.
WRITE PORT B
^
ab
CHANGE ETU
+
abcd
READ DATA
SET DATA TO 0
SET DATA TO 1
C
C
T
L
Y
N
A
P
M
O
=
Provides Direct Access to All of PORT B on the 68HC711e9. May be Used As General Purpose Output.
“a” is the Most Significant Byte.
Changes the ETU (Elementary Time Unit) Used by the RECEIVE BLOCK Commands. “a” is the Most
Significant Byte. The Value is Assumed to be Hexadecimal.
Returns “1” if DATA is High and “0” if DATA is Low.
*
Forces the DATA Pin of the LTC1955 Low. For Use with Synchronous Memory Cards.
%
Forces the DATA Pin of the LTC1955 to High Impedance. For Use with Synchronous Memory Cards.
dc465f
9
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
U
OPERATIO
APPENDIX B
THE LTC1955 SERIAL PORT COMMANDS
Table 1. Serial Port Commands
STATUS OUTPUT
CARD B
CARD A
Table 2. VCC and Shutdown Options
BIT
COMMAND INPUT
D9
D1
D8
D0
STATUS (CARD A)
STATUS (CARD B)
0
D0
VCCB Options
0
D1
(See Table 2)
0
0
VCC = 0V (Shutdown)
0
D2
Card B Select/Deselect
0
1
VCC = 1.8V
0
D3
Data Pull-Up Defeat
1
0
VCC = 3V
1
1
VCC = 5V
Card B Electrical Fault
D4
Reserved (Always Set to “0”)
Card B ATR Fault
D5
Card B Clock Options
Card B VCC Ready
D6
(See Table 3)
Card B Present
D7
0
D8
VCCA Options
0
D9
(See Table 2)
0
D10 Card A Select/Deselect
0
D11 Card A Communications
Card A Electrical Fault
D12 Options (See Table 4)
Card A ATR Fault
D13 Card A Clock Options
Card A VCC Ready
D14 (See Table 3)
Card A Present
D15
Y
N
A
P
M
O
L
A
I
T
DEN
I
F
N
CO
C
C
T
L
Table 3. Clock Options
D7
D15
D6
D14
D5
D13
0
0
0
Table 4. Card A Communications Options
CLOCK MODE CARD B
CLOCK MODE CARD A
D12
0
0
Nothing Selected
0
Synchronous Mode
0
1
C4A Connected to DATA Pin
0
1
Unused
1
0
C8A Connected to DATA Pin
0
1
0
Asynchronous Stop Low
1
1
I/O A Connected to DATA Pin
0
1
1
Asynchronous Stop High
1
0
0
Asynchronous ÷1
1
0
1
Asynchronous ÷2
1
1
0
Asynchronous ÷4
1
1
1
Asynchronous ÷8
D11
CARD A COMMUNICATION MODE
dc465f
10
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
U
W
PCB LAYOUT A D FIL
L
A
I
T
DEN
Y
N
A
P
M
O
Top Silkscreen
I
F
N
CO
Top Solder Mask
Top Solder Paste
Layer 2 Ground Plane
Layer 3 DVCC VBATT Plane
C
C
T
L
Layer 1 Top Layer
dc465f
11
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
U
W
PCB LAYOUT A D FIL
L
A
I
T
DEN
Y
N
A
P
M
O
Layer 4 Bottom Layer
I
F
N
CO
Bottom Solder Mask
Bottom Solder Paste
C
C
T
L
Bottom Silkscreen
dc465f
12
DEMO MANUAL DC465
RS232 DUAL SMART CARD INTERFACE
U
PC FAB DRAWI G
3.25"
HOLE CHART
D
A
A
NUMBER
SYMBOL DIAMETER OF HOLES
A
0.125
6
B
0.094
3
C
0.080
4
D
0.070
2
E
0.064
1
F
0.050
20
G
0.040
9
J
0.035
26
K
0.015
71
TOTAL HOLES
142
C
F
F
B
J
B
K
K
F
F
L
A
I
T
DEN
B
E
J
J
J
K
K
K
K K
K
K
J
K
K
K
K
K
J
K
K
C
C
T
L
K
K
J
K
F
J
J
K
K
C
C
NOTES: UNLESS OTHERWISE SPECIFIED
1. MATERIAL: FR4 OR EQUIVALENT EPOXY, 2 OZ COPPER CLAC
THICKNESS 0.62 ±0.006 TOTAL OF 4 LAYERS
2. FINISH: ALL PLATED HOLES 0.001MIN/0.0015 MAX COPPER PLATE
ELECTRODEPOSITED TIN-LEAD COMPOSITION
BEFORE RELOW, SOLDER MASK OVER BARE COPPER (SMOBC)
3. SOLDER MASK: BOTHER SIDES USING LPI OR EQUIVALENT
4. SILKSCREEN: USING WHITE NONCONDUCTIVE EPOXY INK
5. UNUSED SMD COMPONENTS SHOULD BE FREE OF SODLER
6. FILL UP ALL VIAS WITH SOLDER
7. SCORING:
I
F
N
CO
5.85"
F
J
0.017
K
A
F
G
F
K
G
G
Y
N
A
P
M
O
K
J
PLATED
YES
YES
YES
NO
YES
YES
YES
YES
K
K
A
C
A
A
D
DC465 FAB DWG
dc465f
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507 ● www.linear.com
LT/TP 1002 500 • PRINTED IN USA
13
© LINEAR TECHNOLOGY CORPORATION 2002
Similar pages