STLC5460 datasheet(3/54 Pages) STMICROELECTRONICS

3 / 54 page

PIN DEFINITIONS AND FUNCTIONS

Symbol

Pin number

Type (*)

Function

VDD1

Supply Voltage 5V,

±5% .

I (**)

Non Multiplexed Mode:

this input interfaces to the system’s address bus to select an internal

Multiplexed Mode:

A0 at VDD, NRDY/NWAIT pin delivers NWAIT

A0 at VSS, NRDY/NWAIT pin delivers NREADY

RxD3

RxD2

RxD1

RxD0

Receive PCM interface Data : Serial data is received at these lines at

standard TTL or CMOS levels.

I (**)

Non Multiplexed Mode:

this input interfaces to the system’s address bus to select an internal

Multiplexed Mode:

A1 at VDD, NCS signal provided by the system is not inverted by the circuit.

A1 at VSS, NCS signal provided by the system is inverted by the circuit.

TSC0

TSC1

TSC2

TSC3

Tristate control for the PCM interface. These lines are low when the

corresponding TxD outputs are valid.

TxD0

TxD1

TxD2

TxD3

Transmit PCM interface Data : Serial data is sent by these lines at standard

TTL or CMOS levels. These pins can be tristated.

PFS

PCM interface frame synchronization pulse.

PDC

PCM interface data clock, single or double rate.

I (**)

Non Multiplexed Mode:

this input interfaces to the system’s address bus to select an intenal register

for a read or write access.

Multiplexed Mode:

A2 at VDD, AS/ALE signal providedby the system is not inverted by the circuit

A2 at VSS, AS/ALE signal provided by the system is inverted by the circuit

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

I/O

Address Data Bus. If the multiplexed address/data

µP interface bus mode is

selected these pins transfer data and commands between the

µP and the

STLC5460.

If a demultiplexed mode is used, these bits interface with the system data

bus.

VSS1

Ground : 0V

DS/NRD

Motorola like mode: Data Strobe

Intel Like Mode: Not Read

The signal indicates a read operation, active low

RW/NWR

Motorola like mode: Read/Write

Intel Like Mode: Not Write

The signal indicates a Write operation, active low.

NCS

Not Chip select. A low on this line selects the STLC5460 for a read/write

operation.

(*): (I) Input

(O) Output

(IO) In/Output

(OD) Open Drain

(**): With Pull up resistance.

STLC5460

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