ON MC33560DTBR2 Power management and interface ic for smartcard readers and coupler Datasheet

MC33560
Power Management and
Interface IC for Smartcard
Readers and Couplers
The MC33560 is an interface IC for smartcard reader/writer
applications. It enables the management of any type of smart or memory
card through a simple and flexible microcontroller interface. Moreover,
several couplers can be coupled in parallel, thanks to the chip select input
pin (pin #5). The MC33560 is particularly suited to low power and
portable applications because of its power saving features and the
minimum of external parts required. Battery life is extended by the wide
operating range and the low quiescent current in stand by mode. A highly
sophisticated protection system guarantees timely and controlled
shutdown upon error conditions.
• 100% Compatible with ISO 7816–3 Standard
• Wide Battery Supply Voltage Range: 1.8V < VBAT < 6.6V
• Programmable VCC Supply for 3V or 5V Card Operation
• Power Management for Very Low Quiescent Current in Stand By
Mode (30µA max)
• Microprocessor Wake–up Signal Generated Upon Card Insertion
• Self Contained DC/DC Converter to Generate VCC using a Minimum
of Passive Components
• Controlled Power Up/Down Sequence for High Signal Integrity on
the Card I/O and Signal Lines
• Programmable Card Clock Generator
• Chip Select Capability for Parallel Coupler Operation
• High ESD Protection on Card Pins (4kV, Human Body Model)
• Fault Monitoring VBATlow, VCClow and ICClim
• All Card Outputs Current Limited and Short Circuit Protected
• Tested Operating Temperature Range: –25°C to +85°C
Figure 1. Simplified Functional Block Diagram
VBAT
L1
ILIM
PGND
DC/DC
CONVERTER
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SO–24L
DW SUFFIX
CASE 751E
24
1
TSSOP–24
DTB SUFFIX
CASE 948H
24
1
PIN CONNECTIONS
PGND
1
24 ILIM
PWRON
2
23 VBAT
INT
3
22 L1
RDYMOD
4
21 C4
CS
5
20 C8
RESET
6
19 CRDC8
18 CRDCON
IO
7
INVOUT
8
17 CRDDET
ASYCLKIN
9
16 CRDC4
SYNCLK 10
15 CRDCLK
CRDIO 11
14 CRDRST
CRDGND 12
13 CRDVCC
(Top View)
PWRON
INT
RDYMOD
CS
POWER
MANAGER
AND
PROGRAMMING
SYNCLK
ASYCLKIN
INVOUT
CLOCK
GENERATOR
CARD
DETECTOR
DELAY
ORDERING INFORMATION
VBAT
IO
RESET
C4
C8
 Semiconductor Components Industries, LLC, 1999
October, 1999 – Rev. 0
CRDDET
CRDCON
CRDVCC
CRDIO
CRDRST
CRDC4
CRDC8
CRDCLK
CRDGND
LEVEL
TRANSLATOR
1
Device
Package
Shipping
SO–24WB
30 Units/Rail
MC33560DWR2
SO–24WB
1000 Tape & Reel
MC33560DTB
TSSOP–24
62 Units/Rail
MC33560DW
MC33560DTBR2 TSSOP–24
2500 Tape & Reel
Publication Order Number:
MC33560/D
MC33560
MAXIMUM RATINGS (Note 1)
Rating
Symbol
Value
Unit
Battery Supply Voltage
VBAT
7
V
Battery Supply Current
IBAT
± 200
mA
Power Supply Voltage
VCC
6
V
Power Supply Current
ICC
± 150
mA
Digital Input Pins
(2, 4, 5, 6, 7, 9, 10, 17, 18, 20, 21)
VIN
IIN
– 0.5 to VBAT + 0.5 but < 7
±5
V
mA
Digital Output Pins (3, 4, 8)
VOUT
IOUT
– 0.5 to VBAT + 0.5 but < 7
±10
V
mA
Card Interface Pins (11, 13, 14, 15, 16, 19)
VCard
ICard
– 0.5 to VCC + 0.5
± 25
V
mA
IL
± 200
± 100
mA
2
kV
4
kV
Coil Driver Pin (22), ILIM (pin 24)
Power Ground (pin 1)
ESD Capability: (Note 2)
Standard Pins (2, 3, 4, 5, 6, 7, 8, 9, 10, 17, 18,
20, 21, 22, 23, 24)
Card Interface Pins (11, 13, 14, 15, 16, 19)
VESD
SO–24WB Package:
Power Dissipation @ TA = 85 °C
Thermal Resistance Junction to Air
PDs
RθJAs
285
140
mW
°C/W
TSSOP–24 Package:
Power Dissipation @ TA = 85 °C
Thermal Resistance Junction to Air
PDt
RθJAt
220
180
mW
°C/W
TA
– 40 to + 85
°C
TJ
– 40 to + 125
°C
TJmax
150
°C
Operating Ambient Temperature Range
Operating Junction Temperature Range
Max. Junction Temperature (Note 3)
Storage Temperature Range
Tstg
– 65 to + 150
°C
Note 1: Maximum electrical ratings are those values beyond which damage to the device may. TA = 25°C
Note 2: Human body model, R = 1500W, C = 100pF
Note 3: Maximum thermal rating beyond which damage to the device may occur
This device contains protection circuitry to guard against damage due to high static voltages or electric fields. However precautions must be
taken to avoid applications of any voltage higher than maximum rated voltages to this high impedance circuit. For proper operation, input
and output voltages should be constrained to the ranges indicated in the recommended operating conditions.
ELECTRICAL CHARACTERISTICS These specifications are written in the same style as common for standard
integrated circuits. The convention considers current flowing into the pin (sink current) as positive and current flowing out of the pin
(source current) as negative. (Conditions: VBAT = 4V, VCC = 5V nom, PWRON = VBAT , operating mode, –ICC = 10mA, –25°C ≤ TA ≤
85°C, L1 =47µH, RLIM =0W, CRDVCC capacitor=10µF, unless otherwise noted.)
Characteristic
Symbol
Min
Typ
Max
Unit
Supply Voltage Range
normal operating range extended operating range (Note 4)
VBAT
2.2
1.8
6.0
6.6
V
MC33560 Stand By Quiescent Current
PWRON = GND, CRDCON = GND, ASYCLKIN = GND, VBAT = 6V,
all other logic inputs and outputs open
IoBAT
30
ms
DC Operating Current
–ICC = 10mA ; VCC =5V,VBAT = 6V
IBATop
12.5
mA
BATTERY POWER SUPPLY SECTION
VBAT undervoltage detection:
Upper Threshold
Lower Threshold
Hysteresis
V
1.6
1.4
0.2
Note 4: See figures 2 and 3.
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MC33560
VCC = 5V NOMINAL POWER SUPPLY SECTION
Characteristic
Test Conditions
Output Voltage
2.2V
1mA
3.0V
1mA
Symbol
v V v 6V
v –IBAT
CC v 25mA
v VBAT
v 6V
v –ICC v 60mA
(RDYMOD output)
(see table 4)
Peak Output Current
VCC = 4V, internally limited
(RDYMOD = L)
Current limit time–out
VCC = 4V
VCC = 2V; 0°C to +85°C
–40°C to 0°C
Low Side Switch Saturation Voltage
Rectifier on Saturation Voltage
Converter Switching Frequency
Shut Down Current
(Card access deactivated)
Min
Typ
Max
4.75
5.0
5.25
4.60
5.0
5.40
4.2
120
4.5
180
VCC
Card VCC Undervoltage Detection:
Upper Threshold
Lower Threshold
Switching Hysteresis
Start–up Current
VT5H
VT5L
VHYS5
–ICClim
td
–ICCst
V
VCC–0.14
Card VCC Undervoltage Detection:
Upper Threshold
Lower Threshold
Switching Hysteresis
Start–up Current
Shut Down Current
(Card access deactivated)
mA
160
ms
80
50
mA
IL = 50mA, pin 22
IL = 50mA, pin 22 to pin 13
Vsat22
VFsat22
100
160
400
520
TA = 25 °C
PWRON = GND, VCC = 2V
fsw
ISD
120
2.2V
1mA
2.5V
1mA
v V BAT v 6V
v –ICC v 10mA
v V v 6V
v –IBAT
CC v 50mA
V
mV
80
mV
mV
kHz
80
VCC = 3V NOMINAL POWER SUPPLY SECTION (VBAT = 2.5V, –ICC = 5mA)
Test Conditions
Symbol
Characteristic
Output Voltage
Unit
Guaranteed Limits
mA
Unit
Guaranteed Limits
Min
Typ
Max
2.75
3.0
3.25
V
2.60
3.0
3.40
V
VCC
(RDYMOD output)
(see table 4)
V
VT3H
VT3L
VHYS3
–ICCst
ISD
VCC = 2V
PWRON = GND, VCC = 2V
VCC–0.1
2.4
80
mV
2.7
110
50
50
mA
APPLICATION INTERFACE DC SECTION (VBAT = 5V)
Test Conditions
Characteristic
Symbol
Unit
Guaranteed Limits
Min
Typ
Max
Input High Threshold Voltage
(increasing)
pins 2, 4, 5, 6, 10, 17
VIH
0.55*VBAT
0.65*VBAT
V
Input Low Threshold Voltage
(decreasing)
pins 2, 5, 6, 10
pin 17
pin 4
VIL
pins 2, 4, 5, 6, 10, 17
0.45*VBAT
0.40*VBAT
0.5*VBAT
0.3*VBAT
V
Switching Hysteresis
0.3*VBAT
0.2*VBAT
0.3*VBAT
0.06*VBAT
Threshold Voltage
pin 9
pin18
0.5*VBAT
0.4*VBAT
0.6*VBAT
0.6*VBAT
V
Pull–down resistance
VIN = VBAT –1V, pin 2, 6, 7, 10
VIN = 0.5V, pin 3, 4, 5
Pull–up resistance
VHYST
VTH
Output High Voltage
IOH = –2.5µA, pin 3, pin 4 for CS = H
IOH = –50µA, pins 7, 20,21
IOH = –0.2mA, pin 8
pin 4 ( in output mode)
Output Low Voltage
IOL = 1.0 mA, pins 7, 20, 21
IOL = 0.2mA, pins 3, 4, 8
Input Leakage Current
VIN = 2.5V, CS = H, pins 9, 17, 18,
20, 21
Rdown
120
240
500
Rup
VOH
120
240
500
VBAT –1
kW
kW
V
VOL
0.4
V
+/–Ileak
2.0
mA
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3
V
MC33560
CARD INTERFACE DC SECTION (VBAT = 5V)
Characteristic
Test Conditions
Symbol
Min
Output High Voltage
IOH = –20µA, pin 11, 16, 19
IOL = 0.2mA, pins 14, 15
VOH
Output Low Voltage
IOL = 1mA, pins 11, 16, 19
IOL = 0.2mA, pins 14, 15
VOL
I/O Pull–up resistance, operating
mode, CS =L, PWRON =H
VOL = 0.5V, pin 11, 16, 19
Card pins security voltage
(Card access deactivated)
PWRON = GND, lin=10mA, pin 11,
14, 15, 16, 19
Unit
Guaranteed Limits
Typ
Max
VCC –0.9
V
0.4
kW
18
Vsecurity
V
2.0
V
Max
Unit
Note 5: the transistors T1 on lines IO, C4 and C8 (see figure 24) have a max Rdson of 250W.
DIGITAL DYNAMIC SECTION (VBAT = 5V, normal operating mode, Note 6)
Guaranteed Limits
Characteristic
Test Conditions
Symbol
Min
Typ
Input Clock Frequency
pin 9, duty cycle = 50%
fasyclk
20
MHz
Card Clock Frequency
pin 15
fcrdclk
20
MHz
Card Clock Duty Cycle (Note 7)
pin 15, 50% to 50% VCC ,
fio = 16MHz
55
%
Card Clock Rise and Fall Time
pin15, 10% ↔ 90% VCC
I/O Data Transfer Frequency
pin [7, 11], [21, 16], [20, 19] (Note 8)
fio
I/O Duty Cycle
pin [7, 11], [21, 16], [20, 19] (Note 8)
50% to 50% VCC
rio
I/O Rise and Fall Time
pin [7, 11], [21, 16], [20, 19] (Note 8)
10% ↔ 90% VCC
I/O Transfer Time
pin [7, 11], [21, 16], [20, 19] (Note 8)
50% to 50% VCC , L
H, H
L
Card Signal Sequence Interval
pin 11, 14, 15, 16, 19,
VCC power up/down
rclk
45
trclk, tfclk
10
1.0
45
ns
MHz
55
%
trio, tfio
150
ns
ttr
100
ns
1.0
ms
tdseq
Card Detection Filter Time:
Card insertion
Card extraction
tfltin
tfltout
Internal Reset Delay
RES, VCC power up/down
tdres
Ready Delay Time
pin 4
tdrdy
PWRON low Pulse Width
CS = L, pin 2
twon
0.2
50
50
150
150
20
2.0
2.0
ms
ms
ms
ms
ms
Note 6: Pin loading=30pF, except INVOUT=15pF
Note 7: As the clock buffer is optimized for low power consumption and hence not symmetrical, clock signal duty cycle is guaranteed for
divide by 2 and divide by 4 ratio.
Note 8: In either direction
DIGITAL DYNAMIC SECTION (VBAT = 5V, programming mode, Note 6)
Guaranteed Limits
Characteristic
Test Conditions
Symbol
Min
Data Setup Time
RDYMOD, PWRON, RESET, IO
pin 2, 4, 6, 7
tsmod
1.0
Data Hold Time
RDYMOD, PWRON, RESET, IO
pin 2, 4, 6, 7
thmod
1.0
CS low Pulse Width
pin 5
twcs
2.0
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Typ
Max
Unit
ms
ms
ms
MC33560
Figure 3. Maximum Battery and Card Supply
Current vs. VBAT (VCC=3V)
Figure 2. Maximum Battery and Card Supply
Current vs. VBAT (VCC=5V)
200
200
IBATop MAX
180
180
140
120
ICC MAX
I (mA)
I (mA)
140
100
120
ICC MAX
100
80
80
Mode Sync
SYNCLK=4MHz
L1=47µH
Rlim=0
60
40
20
0
1.5
2.5
3.5
4.5
5.5
20
0
1.5
7.5
6.5
Mode Sync
SYNCLK=4MHz
L1=47µH
Rlim=0
60
40
2.5
4.5
3.5
5.5
7.5
VBAT (V)
Figure 4. Battery Current vs. Input Clock Frequency
(ICC=0, VBAT=4V)
Figure 5. Battery Current vs. Input Clock Frequency
(ICC =0, VBAT=2.5V)
14
14
VBAT=4V
L1=47µH
Rlim=0
ICC=0
Async
VBAT=2.5V
L1=47µH
Rlim=0
ICC=0
12
10
IBATop (mA)
10
Sync
8
6
Async/2
4
8
Async
6
Sync
4
Async/4
Async/2
2
0
2
0
2.0
4.0
6.0
8.0
10
12
14
0
16
Async/4
2.0
0
6.0
8.0
10
12
14
Frequency (MHz)
Figure 6. Maximum Battery Current vs. RLIM
(VCC=5V, VBAT=4V)
Figure 7. Maximum Battery Current vs. RLIM
(VCC=3V, VBAT=2.5V)
16
250
Mode Sync
SYNCLK=4MHz
VBAT=4V
L1=100µH
150
200
IBATop Max (mA)
200
L1=47µH
100
50
Mode Sync
SYNCLK=4MHz
VBAT=2.5V
L1=100µH
150
L1=47µH
100
50
L1=22µH
0
4.0
Frequency (MHz)
250
IBATop Max (mA)
6.5
VBAT (V)
12
IBATop (mA)
IBATop MAX
160
160
0
L1=22µH
1
2
3
4
0
5
0
Rlim (ohms)
1
2
Rlim (ohms)
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5
3
4
5
MC33560
Figure 9. Maximum Card Supply Current
vs. RLIM (VCC =3V, VBAT =2.5V)
Figure 8. Maximum Card Supply Current
vs. RLIM (VCC =5V, VBAT =4V)
120
120
80
L1=47µH
60
40
L1=47µH
60
20
L1=22µH
1
0
2
3
0
5
4
L1=22µH
1
0
3
4
Rlim (ohms)
Figure 10. Low Side Switch Saturation Voltage
(IL =50mA) vs. Temperature
Figure 11. Rectifier On Saturation Voltage
(IL =50mA) vs. Temperature
Rectifier On Saturation Voltage (V)
0.06
0.05
0.04
0.03
0.02
0.01
–5
15
35
55
75
0.30
0.25
0.20
0.15
0.10
0.05
0.00
–25
95
–5
TA, Ambient Temperature (°C)
110
110
105
105
tfltout, Filter Time (µs)
115
100
95
90
85
95
90
85
75
75
55
75
95
80
35
55
100
80
15
35
Figure 13. Card Detection (extraction) filter time
vs. Temperature
115
–5
15
TA, Ambient Temperature (°C)
Figure 12. Card Detection (insertion) filter time
vs. Temperature
70
–25
5
0.35
0.07
0.00
–25
tfltin, Filter Time (µs)
2
Rlim (ohms)
0.08
Low Side Switch Saturation Voltage (V)
L1=100µH
80
40
20
0
Mode Sync
SYNCLK=4MHz
VBAT=2.5V
100
ICC Max (mA)
ICC Max (mA)
Mode Sync
SYNCLK=4MHz
VBAT=4V
L1=100µH
100
75
70
–25
95
TA, Ambient Temperature (°C)
–5
15
35
55
TA, Ambient Temperature (°C)
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75
95
MC33560
Figure 14. Pull Down Resistance vs. Temperature
Pull Down Resistance (k W)
350
330
310
290
270
250
230
210
190
170
150
–25
–5
15
35
55
75
95
TA, Ambient Temperature (°C)
Figure 15. Transition from 5V to 3V Card Supply
Figure 16. Transition from 3V to 5V Card Supply
Figure 17. Overcurrent Shutoff (td =160ms)
Figure 18. Undervoltage Shutoff (VT5L=4.6 V)
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MC33560
Figure 19. Functional Block Diagram
VBAT
VBAT
VBATOK
VBAT
240 k
CS
CS
CRDCON
PWRON
PWRON
CRDDET
240 k
VBAT
t
240 k
INT
FAULT
LOGIC
S
Q
VBAT
CARD
R
CS
DELAY
50 mS
CRDVCC
240 k
RDYMOD
POWER
MANAGEMENT
LOGIC AND
PROGRAMMING
VBATOK
CARD PINS
SEQUENCER
FAULT
VBAT
SEQ1 SEQ2 SEQ3
CRDIO
CRDVCC
VBAT
BIDIRECTIONAL
I/O
CARDENABLE
VBATOK
CRDC4
CRDVCC
VBAT
SEQ3
C8
CRDVCC
CRDVCC
BIDIRECTIONAL
I/O
CARDENABLE
VBATOK
SEQ3
C4
ILIM
L1
CRDVCC
ON/OFF 3V/5V
SEQ4
SEQ1
240 k
CARDENABLE
DC/DC CONVERTER
VBAT
IO
PROGRAM
BIDIRECTIONAL
I/O
CARDENABLE
VBATOK
CRDC8
VBAT
CRDVCC
DATA
LATCH
RESET
240 k
CARDENABLE
LEVEL
SHIFT
SEQ4
SYNCLK
CLOCK
GENERATOR
AND
PROGRAMMING
240 k
ASYCLKIN
CRDRST
VBAT
CRDVCC
LEVEL
SHIFT
SEQ2
PROGRAM
INVOUT
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CRDCLK
MC33560
Table 1: PIN FUNCTION DESCRIPTION
Pin
Symbol
Type
Name/Function
CONTROLLER INTERFACE
2
PWRON
INPUT
pull down
This pin is used to start operation of the internal DC/DC converter.
In programming mode, this pin is used to set the ”Output Voltage” switch. (see table 2).
3
INT
OUTPUT
pull up
This open collector pin indicates a change in the card presence circuit status. When a card is
inserted or extracted, the pin goes to logic level ”0”. The signal is reset to logic level ”1” upon
the rising edge of CS or upon the rising edge of PWRON. In the case of a multislot
application, two or more INT outputs are connected together and the microcontroller has to
poll all the MC33560s to identify which slot was detected.
4
RDYMOD
I/O & pull up
This bidirectional pin has tri–state output and schmitt trigger input.
* When RDYMOD is forced to 0, the MC33560 can be set to programming mode by a
negative transition on CS.
* When RDYMOD is connected to a high impedance, the MC33560 is in normal operating
mode, and RDYMOD is in output mode (see tables 2 and 4):
– With CS=L and PWRON=H, RDYMOD indicates the status of the DC/DC converter.
– With CS=L and PWRON=L, RDYMOD indicates the status of the card detector.
5
CS
INPUT pull up
This is the MC33560 chip select signal. Pins 2, 6, 7, 10, 20, 21 are disabled when CS=H. When
RDYMOD=L, the MC33560 enters programming mode upon the falling edge of CS (see figure
20)
6
RESET
INPUT
pull down
The signal present at this input pin is translated to pin 14 (the card reset signal) when CS=L.
The signal on this pin is latched when CS=H. This pin is also used in programming mode (see
table 2).
7
IO
I/O
This pin connects to the Serial I/O port of a microcontroller. A bi–directional level translator
adapts the serial I/O signal between the smartcard and the microcontroller. The level
translator is enabled when CS=L. The signal on thispin is latched when CS=H. This pin is also
used in programming mode. (see table 2)
8
INVOUT
CLK
OUTPUT
The ASYCLKIN (pin 9) signal is buffered and inverted to generate the output signal INVOUT.
This output is used for multislot applications, where the ASYCLKIN inputs and INVOUT
outputs are daisy–chained (see the multislot application example in figure 33).
9
ASYCLKIN
CLK INPUT
high impedance
This pin can be connected to the microcontroller master clock or any clock signal for
asynchronous cards. The signal is fed to the internal clock selector circuit, and is translated to
CRDCLK at the same frequency, or divided by 2 or 4, depending on programming (see table
3).
10
SYNCLK
CLK INPUT
pull down
This function is used for communication with synchronous cards, and the pin is generally
connected to the controller serial interface clock signal. The signal is fed to the internal clock
selector circuit, and is translated to CRDCLK upon appropriate programming of the MC33560
(see table 3). When selected at programming, the signal on this pin is latched when CS=H.
20
C8
I/O
General purpose input/output. It has the same behavior as I/O, except for programming. It can
be connected to abidirectional port of the microcontroller. The level translator is en abled
when CS=L, and the signal is latched whenCS=H. (compare with pin 19)
21
C4
I/O
General purpose input/output. It has the same behaviour as I/O, except for programming. It
can be connected to a bidirectional port of the microcontroller. The level translator is enabled
when CS=L, and the signal is latched when CS=H. (compare with pin 16)
CARD INTERFACE
11
CRDIO
I/O
This pin connects to the serial I/O pin of the card connector. A bidirectional level translator
adapts the serial I/O signal between the card and the microcontroller (compare with pin 7)
14
CRDRST
OUTPUT
This pin connects to the RESET pin of the card connector. A level translator adapts the
RESET signal driven by the microcontroller (compare with pin 6).
15
CRDCLK
OUTPUT
This pin connects to the CLK pin of the card connector. The CRDCLK signal is the output of
the clock selector circuit.The clock selection is programmed using pins 2, 6 and 7 with
RDYMOD forced to ”0”.
16
CRDC4
I/O
General purpose input/output. It has the same behavior as CRDIO. It can be connected to the
C4 pin of the card connector.
17
CRDDET
INPUT high
impedance
This pin connects to the card detection switch of the card connector. Card detection phase is
determined with pin 18. This pin needs an external pull–up or pull–down resistor to operate
properly.
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MC33560
Pin
Symbol
Type
Name/Function
CARD INTERFACE
18
CRDCON
INPUT high
impedance
This pin connects to PGND or VBAT, or possibly to an output port of the microcontroller. With
this pin set to a logic “0”, the presence of a card is signalled with a logic ”1” on pin 17. With
this pin set to a logic ”1”, the presence of a card is signalled with a logic ”0” on pin 17.
19
CRDC8
I/O
General purpose input/output. It has the same behavior as CRDIO. It can be connected to the
C8 pin of the card connector
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CURRENT LIMIT AND THERMAL PROTECTION
1
PGND
POWER
This pin is the return path for the current flowing into pin 22 (L1). It must be connected to
CRDGND using appropriate grounding techniques.
12
CRDGND
POWER
This pin is the signal ground. It must be connected to the ground pin of the card connector. It
is the reference level for all analog and digital signals.
13
CRDVCC
POWER
This pin connects to the VCC pin of the card connector. It is the reference level for a logic ”1”
of pins 11, 14, 15, 16 and 19.
22
L1
POWER
This pin connects to an external inductance for the DC/DC converter. Please refer to the
description of the DC/DC converter functional block.
23
VBAT
POWER
This pin is connected to the supply voltage. Logic level ”1” of pins 2 to 10, 17, 18, 20 and 21 is
referenced to VBAT. Operation of the MC33560 is inhibited when VBAT is lower than the
minimum value.
24
ILIM
POWER
This pin can be connected to the PGND pin, or to a resistor connected to PGND, or left open,
depending on the peak coil current needed to supply the card.
PROGRAMMING AND STATUS FUNCTIONS
The MC33560 features a programming interface and a status interface. Figure 20 shows how to enter and exit programming
mode; table 2 shows which pins are used to access the various functions.
Figure 20. MC33560 Programming Sequence
RDYMOD (in)
CS
PWRON
PROGRAM DATA VALUE
RESET
PROGRAM DATA VALUE
IO
PROGRAM DATA VALUE
ENTER
PROGRAMMING
MODE
LATCH
EXIT
PROGRAM PROGRAMMING
VALUE
MODE
Table 2: PIN USE FOR PROGRAMMING AND STATUS FUNCTIONS
Programs
CRDVCC
TO 3V/5V
Select VCC
ON/OFF
Select
Clock Input
Program ASYCLKIN
Divide Ratio
Poll Card
Status
Poll CRDVCC
Status
RDYMOD
(in/out)
Force to 0
READ
Force to 0
Force to 0
READ
READ
CS (in)
rising edge
0
rising edge
rising edge
0
0
PWRON
0/1
0/1
Programs CRDVCC
Programs CRDVCC
0 or Hi–z
1
RESET (in)
Programs CLK
input/divide ratio
NOT USED
0/1
0/1
NOT USED
NOT USED
IO (in)
Programs CLK
input/divide ratio
NOT USED
0/1
0/1
NOT USED
NOT USED
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MC33560
CARD VCC AND CARD CLOCK PROGRAMMING
The CRDVCC and ASYCLK programming options allow the system clock frequency to be matched to the card clock
frequency and to select 3V or 5V CRDVCC supply. Table 3 shows the values of PWRON, RESET and IO for the possible
options. The default power reset condition is state 4 (synchronous clock and CRDVCC =5V). All states are latched for each
output variable in programming mode at the positive transition of CS (see figure 20).
Table 3 : CARD VCC AND CARD CLOCK TRUTH TABLE
STATE#
PWRON
RESET
IO
CRDVCC
CRDCLK
0
L
L
L
3V
SYNCLK
1
L
L
H
3V
ASYCLKIN/4
2
L
H
H
3V
ASYCLKIN/2
3
L
H
L
3V
ASYCLKIN
4
H
L
L
5V
SYNCLK
5
H
L
H
5V
ASYCLKIN/4
6
H
H
H
5V
ASYCLKIN/2
7
H
H
L
5V
ASYCLKIN
Note : Card clock integrity is maintained during all frequency commutations (no spikes).
State 4 is the default state at power on.
DC/DC CONVERTER AND CARD DETECTOR STATUS
The MC33560 status can be polled when CS=L. Please consult table 2 for a description of input and output signals.The
significance of the status message is described in table 4.
Table 4 : RDYMOD STATUS MESSAGES
PWRON
(input)
RDYMOD
(output)
Message
LOW
LOW
No card
LOW
HIGH
Card present
HIGH
LOW
DC/DC converter overload
HIGH
HIGH
DC/DC converter OK
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MC33560
DETAILED OPERATING DESCRIPTION
INTRODUCTION
generator. The power management unit enables the DC/DC
converter for card power supply, supervises the power
up/down sequence of the card’s I/O and signal lines, and
keeps the power consumption very low in stand by mode.
All card interface pins have adequate ESD protection, and
fault monitoring (VBATlow, VCClow, ICClim) guarantees
hazard–free card reader operation.
Several MC33560s can be operated in parallel, using the
same control and data bus, through the use of the chip select
signal CS.
The MC33560 smartcard interface IC has been designed
to provide all necessary functions for safe data transfers
between a microcontroller and a smartcard or memory card.
A card detector scans for the presence of a card and
generates a debounced wake–up signal to the
microcontroller.
Communication and control signal levels are translated
between the digital interface and the card interface by the
voltage level translator, and the card clock is matched to the
system clock frequency by the programmable card clock
Figure 21. MC33560 Operating Modes
CS: FALLING EDGE
STAND BY MODE
CS = H
PWRON = L
ERROR
CONDITION
ACTIVE MODE
CS = L
PWRON = L
CS: RISING EDGE
RDYMOD: 0 AND
CS: FALLING EDGE
CS: 1 AND
RDYMOD: RISING EDGE
ISO STOP SEQUENCE
CS: 0 AND
PWRON: RISING EDGE
PWRON: FALLING EDGE
OR ERROR CONDITION
ISO START SEQUENCE
PROGRAMMING MODE
CS = L
RDYMOD = L
TRANSACTION MODE
CS = L
PWRON = H
OPERATING MODES
IDLE MODE
CS = H
PWRON = H
CS: 1 AND
RDYMOD: RISING EDGE
RDYMOD: 0 AND
CS: FALLING EDGE
PROGRAMMING MODE
CS = L
RDYMOD = L
The microcontroller polls the MC33560 by asserting
CS=L and reading the RDYMOD pin.
If a card is present, the microcontroller starts the DC/DC
converter by asserting PWRON=H. This starts the
automatic power on sequence: when CRDVcc reaches the
undervoltage level (VT5H or VT3H, depending on
programming), the card sequencer validates CRDIO,
CRDRST, CRDCLK, CRDC4, CRDC8 pins according to
the ISO7816–3 sequence (see figure 26). The MC33560 is
now in transaction mode, and the system is ready for data
exchange via the three I/O lines and the RESET line.
The MC33560 has five operating modes:
⋅ stand by
⋅ programming
⋅ active
⋅ transaction
⋅ idle
The transitions between these different states are shown in
figure 21 above.
STAND BY MODE
Stand by mode allows the MC33560 to detect card
insertion and monitor the power supply while keeping the
power consumption at a minimum. It is obtained with CS=H
and PWRON=L.
When the MC33560 detects a card, INT is asserted low to
wake up the Microcontroller.
TRANSACTION MODE
In transaction mode, the MC33560 maintains power and
the selected clock signal applied to the card, and the levels
of the IO, RESET, C4 and C8 signals between the
microcontroller and the card are translated depending on the
supply voltages VBAT and VCC.
The DC/DC converter status can be monitored on the
RDYMOD pin.
PROGRAMMING MODE
The programming mode allows the user to configure the
card Vcc and the card clock signal for his specific
application. The card supply, CRDVcc, can be programmed
to 3V or 5V, and the card clock signal can be defined to be
either synchronous, or asynchronous divided by 1, 2 or 4.
Programming mode is obtained with RDYMOD=L
followed by a negative transition on CS. The programming
options are shown in table 3. Programmed values are latched
on a positive transition of CS with RDYMOD=L.
IDLE MODE
Idle mode is used when maintaining a card powered up
without communicating with it. When an asynchronous
clock is used, the selected clock signal is applied to the card
POWER DOWN OPERATION
Power–down can be initiated by the controlling
microprocessor, by stopping the DC/DC converter with
PWRON=L while CS=L, or by the MC33560 itself when
an error condition has been detected (CRDVcc undervoltage,
overcurrent longer than 160ms typ., overtemperature, “hot”
ACTIVE MODE
In active mode, the MC33560 is selected, the RDYMOD
pin becomes an output, and the MC33560 status can be
polled. Power is not applied to the card.
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MC33560
In stand by mode (PWRON=L) the power manager keeps
only the ”card present” detector alive. All card interface pins
are forced to ground potential.
In the event of a power–up request from the
microcontroller (PWRON L to H transition, CS=L) the
power manager starts the DC/DC converter. As soon as the
CRDVCC supply reaches the operating voltage range, the
circuit activates the card signals in the following sequence:
CRDVCC, CRDIO, CRDCLK, CRDC4/C8, CRDRST
At the end of the transaction (PWRON reset to L, CS=L)
or forced card extraction, the CRDVCC supply powers
down and the card signal deactivation sequence takes place:
CRDRST, CRDC4/C8, CRDCLK, CRDIO, CRDVCC
When CS=L, the bi–directional signal lines (IO, C4 and
C8) are put into high impedance state to avoid signal
collision with the microcontroller in transmission mode.
card extraction). The communication session is terminated
in a given sequence defined in ISO7816–3.
The MC33560 then goes into active mode, in which its
status can be polled.
Stand by mode is reached by deselecting the MC33560
(CS=H).
FUNCTIONAL BLOCKS
CARD DETECTOR
This block monitors the card contact CRDDET (during
insertion and extraction), filters the incoming waveform and
generates an interrupt signal INT after each change. In order
to identify which coupler activated the INT line
(multicoupler application) the microcontroller scans both
circuits via CS and reads the RDYMOD pin.
The programming input CRDCON tells the level detector
which type of mechanical contact is implemented (normally
open or normally closed). Special care is taken to hold the
current consumption very low on this part of the circuit
which is continuously powered by the VBAT supply.
The CRDDET pin has high impedance input, and an
external resistor must be connected to pull–up or pull– down,
depending on CRDCON. This resistor is chosen according to
the maximum leakage current of the card connector and the
PCB.
The card detector has an internal 50µs debouncing delay.
The micro controller has to insert an additional delay (in the
ms range) to allow the card contacts to stabilize in the card
connector before setting PWRON=H.
When the card detector circuit detects a card extraction, it
activates the power–down sequence and stops the converter,
regardless of the PWRON signal. The 50µs delay of the
debouncer is enough to ensure that all card signals have
reached a safe value before communication with the card
takes place.
BATTERY UNDERVOLTAGE DETECTOR
The task of this block is to monitor the supply voltage, and
to allow operation of the DC/DC converter only with valid
voltage (typically 1.5 V). The comparator has been designed
to have stability better than 20mV in the temperature range.
DC/DC CONVERTER
Upon request from the power manager, the DC/DC
converter generates the CRDVCC supply for the smartcard.
The output voltage is programmable for 3V or 5V (see table
3) to guarantee full cross compatibility of the reader for 5V
and 3V smartcards. The wide voltage supply range, 1.8V <
VBAT < 6.6V, accommodates a broad range of coupler
applications with different battery configurations (single
cell or multiple cells, serial or parallel connections).
CRDVCC
is
current–limited
and
The
short–circuit–proof.To avoid excessive battery loading
during a card short–circuit, a current integration function
forces the power–down sequence (see figure 28). To retry
the session, the microprocessor works through the power on
sequence as defined in the power manager section.
CARD STATUS
The controlling microprocessor is informed of the
MC33560 status by interrupt and by polling. When a card is
extracted or inserted, the INT line is asserted low. The
interrupt is cleared upon the rising edge of CS or upon the
rising edge of PWRON (INT line set to high state).
The microprocessor can poll the status at any time by
reading the RDYMOD pin with proper PWRON setting
(see tables 2 and 4 ).
Since INT and RDYMOD have a high value pull–up
resistor (240kW typ.), their rise time can be as long as 10µs
if parasitic capacitance is high and no other pull–up circuitry
is connected.
DC/DC Converter operating principles
The DC/DC converter architecture used in the MC33560
allows step–up and step–down voltage conversion to be
done. The unique regulation architecture permits an
automatic transition from step–up to step–down, and from
zero to full load, without affecting the output characteristics.
DC/DC Converter Description: The converter
architecture is very similar to the boost architecture, with an
active rectifier in place of the diode. The switching transistor
is connected to ground through a resistor network in order to
adjust the maximum peak current (see figure 22). A transistor
connected to the converter output (CRDVCC) forces this pin
to a low voltage when the converter is not operating. This
prevents erratic voltage supply to the smartcard when not in
use.
POWER MANAGER
The task of the power manager is to activate only those
circuit functions which are needed for a determined operating
mode in order to minimize power consumption (see figure
19).
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MC33560
Fault Detection: The DC/DC converter has several
features that help to avoid electrical overstress of the
MC33560 and of the smartcard, and help to ensure that data
transmission with the smartcard occurs only when its supply
voltage is within predetermined limits. These functions are:
⋅ overtemperature detection,
⋅ current limitation, and
⋅ card supply undervoltage detection.
The level at which current will be limited is defined by the
maximum card supply current programmed with the
external components L1 and RLIM.
The undervoltage detection levels for 3V and 5V card
supply are preset internally to the MC33560.
The MC33560 has a built in oscillator; the DC/DC
converter requires only one inductor and the output filtering
capacitor to operate.
Step–Up Operation: When the card supply voltage is
lower than the battery voltage, the converter operates like a
boost converter; the active rectifier behavior is similar to
that of a diode.
Step–Down Operation: When the card supply voltage is
higher than the battery voltage, the rectifier control circuit
puts the power rectifying transistor in conduction when the
L1 voltage reaches VBAT+VFSAT22. The voltage across the
rectifying transistor is higher than in step–up operation. The
efficiency is lower, and similar to a linear regulator.
Figure 22. DC/DC Converter Functional Block
VBAT
Rectifier Switch
CRDVCC
L1
Active pull–down
switch
PWN
FEED
BACK CLOCK OFF
RECTIFIER
CONTROL
Low Side
Switch
STOP
ON /OFF
ILIMCOMP
120 mV
2W
PGND
0.5 W Internal
resistors
ILIM
RLIM (external)
–
LOGIC
AND
COUNTER
OVER TEMP
DETECTION
ON /OFF
CRDGND
–
+
ON /OFF
DIGITAL
FILTER
ON /OFF
+
3V/5V
UNDER VOLTAGE
DETECTOR
VBATOK
CONVERTER
FAULT +
CRDGND
VREF
ERROR
AMP.
–
The overcurrent and undervoltage protection features are
complementary, and will shut the circuit off either if the
overcurrent is high enough to bring the CRDVCC output
below the preset threshold, either after 160ms (typ.)
In addition, the DC/DC converter will be allowed to start
only if the battery supply voltage is high enough to allow
normal operation (1.8V).
The undervoltage comparator has a hysteresis and a delay
of typically 20ms to ensure stable operation. The current
detector is a comparator associated with two resistors: one
2W attached to PGND and usually connected to analog
ground, and a 0.5W attached to ILIM, usually connected to
ground through an external resistor to adjust the maximum
peak current. The voltage developed across this resistor
network is then compared to a 120mV (typical) reference
voltage, and the comparator output performs a
cycle–by–cycle peak current limitation by switching off the
low side transistor when the voltage exceeds 120 mV.
The internal ILIMCOMP signal is monitored to stop the
converter if current limitation is continuously detected
during 160ms (typical). This allows normal operation with
high filtering capacitance and low peak current, even at
converter start–up. As a result, a short circuit to ground on
the card connector or a continuous overcurrent is reported by
RDYMOD 160ms (typical) after power up.
Unexpected card extraction: The MC33560 detects card
extraction and runs a power down sequence if card power is
still on when extraction occurs. An active pull–down switch
clamps CRDVCC to GND within 150µs (max) after
extraction is detected. The external capacitors will then be
discharged. With typical capacitor values of 10µF and 47nF
as indicated in the application schematic, the time needed to
discharge CRDVCC to a voltage below 0.4V can be
estimated to less than 750µs. The total time aftercard
extraction detection until CRDVCC reaches 0.4V is then
estimated to 900µs (max). All smartcard connector contacts
will be deactivated before CRDVCC deactivation. This
ensures that no electrical damage will be caused to the
smartcard under abnormal extraction conditions.
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MC33560
3V/5V programming: It is possible to set the card supply
voltage to 3V or 5V at any time, before DC/DC converter
start, or during converter operation. When switching from
3V to 5V, a 160ms (typical) delay blanks the undervoltage
fault detection to allow filter capacitor charging.
PWM: The free–running integrated oscillator has two
working modes:
⋅ variable on–state and fixed frequency (typically
120KHz) for average to heavy loads.
⋅ variable on–state and variable frequency for light loads.
The frequency can be as low as a few kHz if no load is
connected to CRDVCC.
The charging current of the timing capacitor is related to
the VBAT supply voltage, to allow better line regulation, and
to increase stability.
Filtering Capacitor: A high value allows efficient
filtering of card current spikes. Low values allow low
start–up charging current. Care must be taken not to
combine low capacitor value with high current limiting, as
this can generate high ripple. Usual values range from 4.7µF
to 47µF, depending on current limiting.
Selecting the external components L1 and RLIM: The
choice of inductor L1 and resistor R4 is made by using figure
8 (5V card) and/or figure 9 (3V card) on page 8:
First, determine the maximum current that the application
requires to supply to the card (ICCmax, on the y–axis)
Then, select one curve that crosses the selected ICCmax
level. The curve is associated with an inductance value
(22µH, 47µH, or 100µH).
Finally, use the intersection of the curve and the ICCmax
level to find the Rlim value on the x–axis.
Good starting values are : L1 =47µH; Rlim =0.5W
Note also that, for a high inductance value (100µH), the
filtering capacitor is generally charged before inductance
current reaches current limitation, while for alow inductance
value, the current limitation is activated after a few converter
cycles.
Battery requirements: Having determined the L1 and
Rlim values, the maximum current drawn from the battery
supply is shown by the curves in figures 6 and 7.
When the application is powered by a single 3V battery,
special care has to be taken to extend its lifetime. When
lithium batteries approach the end–of–life, their internal
resistance increases, while voltage decreases. This
phenomenon can prevent the start–up of the DC/DC
converter if the current limiting is set too high, because of the
filtering capacitor charging current.
used to configure the two output variables CRDVCC and
CRDCLK as described in table 3. This circuit setup is
latched during the positive transition of CS.
Furthermore, in asynchronous mode the system clock
frequency ASYCLKIN can be divided by a factor of 1, 2 or
4. The circuit controls the frequency commutation to
guarantee that the card clock signal remains free from spikes
and glitches. In addition, this circuit ensures that CRDCLK
signal pulses will not be shorter than the shortest and/or
longer than the longest of the clock signals present before
and after programming changes .
The INVOUT output is provided to drive other circuits
without additional load to the microprocessor quartz
oscillator. It can also be used to build a local RC oscillator.
This driver has been optimized for low consumption; it has
no hysteresis, and input levels are not symmetrical. If the
ASYCLKIN pin is connected to a sine wave, the duty cycle
will not always be 50% at INVOUT.
Clock generator operating principles
Synchronous Clock: This clock is used mainly for
memory cards. It can also be used for asynchronous
(microprocessor) cards, allowing the use of two different
clock sources. The status of SYNCLK is latched at CRDCLK
when CS goes high, so that data (the IO pin) and clock are
always consistent at the card connector, whatever the CS
status is. When using the synchronous clock, the clock
output becomes active only when the MC33560 is selected
with CS.
Asynchronous Clock: This clock is used mainly for
microprocessor cards. When applied, the clock output
remains active even when the MC33560 is not selected with
CS, in order to keep the microprocessor running and avoid
an unwanted reset. The ASYCLKIN signal is buffered at the
INVOUT pin, so that several MC33560 systems can use the
same clock with one load only.
Depending on programming, the frequency is fed directly,
or divided by 2 or by 4 to the CRDCLK pin. If the duty cycle
of the applied clock signal is not exactly symmetrical, it is
recommended that the clock signal be divided by two or four
to guarantee 50% duty cycle.
Clock Signal Synchronization and Consistency (see
figure 29). The clock divider includes synchronization logic
that controls the switch from synchronous clock to
asynchronous (and vice–versa), from any division ratio to
any other ratio, during CS changes and at power up. The
synchronization logic guarantees that each clock cycle on
the CRDCLK pin is finished before changing clock
selection (and has always the adequate duration), regardless
of the moment the programming is changed.
At power–up, when ASYCLKIN is selected, the clock
signal at the CRDCLK pin has an entire length, according
to the selected divide ratio, whatever the ASYCLKIN signal
is versus the internal sequencer timing.
CLOCK GENERATOR
The primary purpose of the clock generator module is to
match the smartcard operating frequency to the system
frequency. The source frequency can be provided to
ASYCLKIN by the microcontroller itself or from an
external oscillator circuit.
In programming mode (RDYMOD=L and CS asserted
low) the three input variables PWRON, IO and RESET are
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MC33560
CARDENABLE
ASYCLKIN
B2
INVOUT
B2
SELECTOR
LATCH
SYNCLK
SYNCHRONISATION
LOGIC
Figure 23. Clock Generator Functional Block
CRDVCC
SYNCHRO
LATCH
CRDCLK
SEQ3
RESET
SELECTOR
LATCH
IO
PROGRAM
BIDIRECTIONAL LEVEL TRANSLATOR
This module (used on IO/CRDIO, C4/CRDC4,
C8/CRDC8, see figure 24) adapts the signal voltage levels
of the I/O and control lines between the micro controller
(supplied by VBAT) and the smartcard (supplied by
CRDVCC)
When CS is low, with CRDVCC on, and start sequencing
completed, this module is transparent for the data, and acts
as if the card was directly connected to the reader
microcontroller. The core of the level shifter circuit defined
for the bidirectional CRDIO, CRDC4 and CRDC8 lines
consists of a NMOS switch which can be driven to the logic
low state from either side (microcontroller or card). If both
sides work in transmission mode with opposite phase, then
signal collision on the line is not avoidable. In this case, the
peak current is limited to a safe value for the integrated
circuit and the smartcard.
During high–to–low transitions, the NMOS transistor
impedance (T1=250W max.) is low enough to charge
parasitic capacitance, and have a high enough dv/dt. On low
to high transition, the NMOS transistor is not active above
a certain voltage, and an acceleration circuit is activated to
ensure a high dv/dt.
When the chip is disabled (CS=H) with the voltage supply
CRDVCC still active, the IO, C4 and C8 lines keep their last
logic state.
When the converter is off, a transistor forces the CRDIO,
CRDC4 and CRDC8 lines to a low state, thus preventing
any unwanted voltage level to be applied to the data lines
when the card is not in use.
SECURITY FEATURES
The MC33560 has a number of unique security functions
to guarantee that no electrical damage will be caused to the
smartcard:
⋅ Battery supply minimum voltage threshold
⋅ Card supply undervoltage and overcurrent detection
with automatic shutdown
⋅ Card pin overvoltage clamp to CRDVCC
⋅ Card presence detector for ”clean” and fast shut–down
⋅ Consistent card signal sequencing at start–up and
power–down, according to ISO7816, even on error
conditions
⋅ Consistent clock signal, even when division ratio or
synchronization clock signal are changed ”on the fly” during
a card session (see figure 29)
⋅ Active pull–down on all card pins, including
CRDVCC, when not in normal operating mode.
A current limiting function and an overtemperature
detector are limiting power dissipation.
ESD PROTECTION
Due to the nature of smartcards, the card interface pins
must absorb high ESD (Electro Static Discharge) energy
during card insertion. In addition, the control circuits
attached to these pins must safely withstand short circuits
and voltage transients during forced card extraction.
Therefore, the MC33560 features enhanced ESD
protection, current limitation and short circuit protection on
all smartcard interface pins, including C4 and C8.
PARALLEL OPERATION
For applications where two or more MC33560 are used,
the digital control and data bus lines are common to all
MC33560. Only the chip select signal, CS, requires a
separate line for each interface.
While deselected, all communication pins except
CRDCLK will keep their logical state on the card side, and
will go to high impedance mode on the microprocessor side.
Figure 33 shows a typical application of a dual card reader.
This arrangement was chosen only to illustrate the parallel
operation of two card interfaces in the same module. The
discrete capacitor components are necessary to provide low
Figure 24. Bidirectional Translator Functional Block
VBAT
CRDVCC
18 K
IO
(C4)
(C8)
CRDIO
(CRDC4)
(CRDC8)
T1
CONTROL
LOGIC
SEQ1 (SEQ3)
T2
CRDGND
CARDENABLE
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MC33560
impedance on the supply lines VBAT and CRDVCC and to
suppress the high frequency noise due to the DC/DC
converter. The load resistors are external in order to adapt
the sense current of the ”cardpresent” switches.
In order to maintain stand by current at a minimum value,
all pins with pull–up resistance (CS, INT, RDYMOD) have
to be kept in the high state or left open, and pins with
pull–down resistance (RESET, SYNCLK, PWRON) have
to be kept in the low state or left open. ASYCLKIN should
not be connected to an active clock signal during stand by to
avoid dynamic currents. This is valid also for SYNCLK,
except that it can be left open.
MINIMUM POWER CONSUMPTION
CONSIDERATIONS
All analog blocks except the VBAT comparator and the
card presence detector are disabled in stand by mode
(CS=H: DC/DC converter stopped).
Figure 25. Example of single sided PCB layout for MC33560
C8
C4
CRDC8
CRDDET
CRDC4
CRDCLK
CRDRST
L1
CRDVCC
VBAT
ILIM
PGND
C10
R4
C6
C7
CRDGND
CRDIO
PWRON
SYNCLK
INT
ASYCLKIN
RDYMOD
INVOUT
CS
IO
RESET
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MC33560
Figure 26. Card Signal Sequence During VCC Power Up/Down
POWER UP
NORMAL OPERATION
POWER DOWN
VTxH
CRDVCC
CS
RDYMOD (out)
twon
PWRON
IO
CLK
C4. C8
RESET
CRDIO
CRDCLK
CRDC4, CRDC8
ttr
CRDRST
SEQ4 to SEQ1
SEQ1 to SEQ4
Figure 27. Interrupt Servicing and Polling
tfltin
tfltout
CRDDET
INT
CS
RDYMOD (out)
CS to INT
15 mS typ.
INTERRUPT
SERVICING
tdrdy
POLLING
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18
INTERRUPT
SERVICING
POLLING
MC33560
Figure 28. Card Signal Sequence During VCC Overload and Unexpected Card Extraction
MCU deactivates PWRON
after card extraction
poll with PWRON = L –>
RDYMOD = H: card still present
CS = L, PWRON = H
CRDVCC undervoltage
–> RDYMOD = L
overload time
smaller than tdres
(glitch not to scale)
card inserted
tfltin
tfltout
VTxH
VTxL
CRDVCC
CRDDET
INT
CS
RDYMOD
PWRON
tdrdy
poll with PWRON = L –> RDYMOD = H:
card present
tdres
tdres
35 ns typ
MCU polls
RDYMOD = H
overload time
greater than tdres –>
converter stop and
CRDVCC pull down
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19
card extraction
poll with PWRON = H –> RDYMOD = L:
DC/DC converter overload
MC33560
RDYMOD
CS
RESET
IO
SYNCLK
ASYCLK
CRDCLK
RDYMOD
CS
RESET
IO
SYNCLK
ASYCLK
CRDCLK
Figure 29. ”On–the–fly” Card Clock Selection Examples
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20
M1
7805
47k
+
C1
Connector 10 uF
DB9
U3
C1+
VCC
C2–
C1–
VSS
RX1
VDD
DO1
TX1
RX2
DI 1
DO2
TX2
DI 2
RX3
TX3
DO3
DI 3
C4
+ 10 uF
C2 mC reset
10 uF
MC145407
Q1: XTAL 4MHz
D1: General Purpose diode
R1: 47 kOhm
C1, C2, C4,C5: 10 uF
R2: 1 MOhm
C3: 220 nF
L1: MURATA LQH3C 47 uH
R3: 1 MOhm
C6: 200 nF
C7: 10 uF
C8, C9: 22 pF
M1: 7805 regulator
R4: Value depending on max. card current
Z1: General Purpose 40 V zener diode
U4: Card connector
R1
RESET VDD
IRQ
0SC1
C3
VPP OSC2
220 nF NC
TCAP
PA7
PD7
PA6
NC
PA5 TCMP
PA4
SS
PA3
SCLK
PA2
MOSI
PA1
MISO
PA0
RDI
PB0
TDO
PB1
PC0
PB2
PC1
PB3
PC2
NC
PC3
PB4
PC4
PB5
PC5
PB6
PC6
PB7
PC7
VSS
NC
MC68HC705C9
U1
Z1
Q1
4 MHz
C8
22 pF
R3
1M
C10
0.1 uF
C9
22 pF
R4*
U2
MC33560
1 – PGND
2 – PWRON
3 – INT
4 – RDYMOD
5 – CS
6 – RESET
7 – IO
8 – INVOUT
9 – ASYCLKIN
10 – SYNCLK
11 – CRDIO
12 – CRDGND
L1
47 uH
ILIM – 24
VBAT – 23
L1 – 22
C4 – 21
C8 – 20
CRDC8 – 19
CRDCON – 18
CRDDET – 17
CRDC4 – 16
CRDCLK – 15
CRDRST – 14
CRDVCC – 13
Card Detect
R2
1M
C8
C4
CLK
RST
VCC
GND
I/O
C7
C6
10 uF 200 nF
U4
Card Slot
MC33560
21
http://onsemi.com
C2+
GND
8..40 VDC
Figure 30. Card Reader/Writer Application
C5
10 uF +
D1
VBAT
mC reset
http://onsemi.com
22
MC68HC705
RESET VDD
IRQ
0SC1
VPP OSC2
NC
TCAP
PA7
PD7
PA6
NC
PA5 TCMP
PA4
SS
SCLK
PA3
MOSI
PA2
MISO
PA1
RDI
PA0
TDO
PB0
PC0
PB1
PC1
PB2
PC2
PB3
PC3
NC
PC4
PB4
PC5
PB5
PC6
PB6
PC7
PB7
NC
VSS
1 – PGND
2 – PWRON
3 – INT
4 – RDYMOD
5 – CS
6 – RESET
7 – IO
8 – INVOUT
9 – ASYCLKIN
10 – SYNCLK
11 – CRDIO
12 – CRDGND
MC33560
1 – PGND
2 – PWRON
3 – INT
4 – RDYMOD
5 – CS
6 – RESET
7 – IO
8 – INVOUT
9 – ASYCLKIN
10 – SYNCLK
11 – CRDIO
12 – CRDGND
MC33560
ILIM – 24
VBAT – 23
L1 – 22
C4 – 21
C8 – 20
CRDC8 – 19
CRDCON – 18
CRDDET – 17
CRDC4 – 16
CRDCLK – 15
CRDRST – 14
CRDVCC – 13
ILIM – 24
VBAT – 23
L1 – 22
C4 – 21
C8 – 20
CRDC8 – 19
CRDCON – 18
CRDDET – 17
CRDC4 – 16
CRDCLK – 15
CRDRST – 14
CRDVCC – 13
VBAT
VBAT
GND
I/O
C4
CLK
RST
VCC
C8
Card Detect
GND
I/O
C4
CLK
RST
VCC
C8
Card Detect
MC33560
Figure 31. Multi Slot Card Reader/Writer Application
MC33560
PACKAGE DIMENSIONS
(TSSOP–24)
DTB SUFFIX
PLASTIC PACKAGE
CASE 948H–01
ISSUE O
24X K REF
0.10 (0.004)
0.15 (0.006) T U
M
T U
V
S
S
S
2X
24
L/2
13
B
–U–
L
PIN 1
IDENT.
12
1
0.15 (0.006) T U
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSION A DOES NOT INCLUDE MOLD
FLASH, PROTRUSIONS OR GATE BURRS. MOLD
FLASH OR GATE BURRS SHALL NOT EXCEED 0.15
(0.006) PER SIDE.
4. DIMENSION B DOES NOT INCLUDE INTERLEAD
FLASH OR PROTRUSION. INTERLEAD FLASH OR
PROTRUSION SHALL NOT EXCEED
0.25 (0.010) PER SIDE.
5. DIMENSION K DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.08 (0.003) TOTAL IN
EXCESS OF THE K DIMENSION AT MAXIMUM
MATERIAL CONDITION.
6. TERMINAL NUMBERS ARE SHOWN FOR
REFERENCE ONLY.
7. DIMENSION A AND B ARE TO BE DETERMINED
AT DATUM PLANE –W–.
S
A
–V–
DIM
A
B
C
D
F
G
H
J
J1
K
K1
L
M
C
0.10 (0.004)
–T– SEATING
PLANE
G
D
H
–W–
DETAIL E
N
0.25 (0.010)
K
ÉÉÉ
ÇÇÇ
ÇÇÇ
ÉÉÉ
K1
J1
M
N
F
SECTION N–N
DETAIL E
J
http://onsemi.com
23
MILLIMETERS
MIN
MAX
7.70
7.90
4.30
4.50
–––
1.20
0.05
0.15
0.50
0.75
0.65 BSC
0.27
0.37
0.09
0.20
0.09
0.16
0.19
0.30
0.19
0.25
6.40 BSC
0_
8_
INCHES
MIN
MAX
0.303
0.311
0.169
0.177
–––
0.047
0.002
0.006
0.020
0.030
0.026 BSC
0.011
0.015
0.004
0.008
0.004
0.006
0.007
0.012
0.007
0.010
0.252 BSC
0_
8_
MC33560
PACKAGE DIMENSIONS
(SO–24L)
DW SUFFIX
PLASTIC PACKAGE
CASE 751E–04
ISSUE E
–A–
24
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN
EXCESS OF D DIMENSION AT MAXIMUM
MATERIAL CONDITION.
13
–B–
12X
P
0.010 (0.25)
1
M
B
M
12
24X
D
J
0.010 (0.25)
M
T A
S
B
S
F
R
C
–T–
SEATING
PLANE
M
22X
G
K
X 45 _
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
15.25
15.54
7.40
7.60
2.35
2.65
0.35
0.49
0.41
0.90
1.27 BSC
0.23
0.32
0.13
0.29
0_
8_
10.05
10.55
0.25
0.75
INCHES
MIN
MAX
0.601
0.612
0.292
0.299
0.093
0.104
0.014
0.019
0.016
0.035
0.050 BSC
0.009
0.013
0.005
0.011
0_
8_
0.395
0.415
0.010
0.029
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes
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24
MC33560/D