MC33560

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Table 1. PIN FUNCTION DESCRIPTION

Pin

Symbol

Type

Name/Function

CONTROLLER INTERFACE

2

PWRON

INPUT

Pulldown

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

Pullup

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 and Pullup

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 Pullup

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.

(Figure 20)

6

RESET

INPUT

Pulldown

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

I/O

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 31)

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

Pulldown

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 a bidirectional port of the microcontroller. The level translator is enabled 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 behavior 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 pullup or pulldown resistor to operate

properly.

18

CRDCON

INPUT high

impedance

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.