STLC5466 datasheet(9/130 Pages) STMICROELECTRONICS

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STLC5466

NDIS/NCS2

I3_ft

If 386EX interface is not selected: DOUT 0/7 Not Disable. When this pin is at

0V, the Data Output 0/7 are at high impedance. Wired at VDD if not used.

If 386EX interface is selected: NCS2 (Chip Select 2) equivalent to NCS1.

Chip Select 2: external memory is selected

During Chip select (NCS2=0), the output Ready (pin 59) is low impedance and

outside Chip select (NCS2=1), the output Ready is high impedance.

CB1

O6D_ft

Contention Bus (CSMA/CR) for 1st 32 HDLC Controller

EC1

I3_ft

Echo for 1st 32 HDLC Controller. Wired at VSS if not used.

128

CB2

O6D_ft

Contention Bus (CSMA/CR) for 2nd 32 HDLC Controller

130

EC2

I3_ft

Echo for 2nd 32 HDLC Controller. Wired at VSS if not used.

BOUDARY SCAN

NTRST

I4_ft

Reset for boundary scan

TMS

I2_ft

Mode Selection for boundary scan

TDI

I2_ft

Input Data for boundary scan

TDO

O3T_ft

Output Data for boundary scan

TCK

I4_ft

Clock for boundary scan

MICROPROCESSOR INTERFACE

MOD0

I1_ft

MOD1

I1_ft

MOD2

I1_ft

80C188 80C186 68000

68020

ST9

ST10 m

ST10Nm

386EX

NRESET

I3_ft

Circuit Reset

NCS0

I3_ft

Chip Select 0: internal registers are selected

NCS1

I3_ft

Chip Select 1: external memory is selected

During Chip select (NCS1=0), the output Ready (pin 59) is low impedance and

outside Chip select (NCS1=1), the output Ready is high impedance.

INT0

O3_ft

Interrupt generated by HDLC, RxC/I or RxMON. Active high.

INT1

O3_ft

Interrupt1.This pin goes to 5V when the selected clock A (or B) has disap-

peared; 250

µs after reset this pin goes to 5V also if clock A is not present.

WDO

O3_ft

Watch Dog Output.This pin goes to 5V during 250

µs when the microprocessor

has not reset the Watch Dog during the programmable time.

SIZE0/NLDS/NLBA

I3_ft

Transfer Size0 (68020)/Lower Data Stobe/Local Bus Access# when 386EX

SIZE1/NBHE/NUDS

I3_ft

Transfer Size1(68020)/Bus High Enable (Intel) / Upper Data Strobe (68000)

NDSACK0/

NDTACK/

NREADY

O6T_ft/

O6D_ft

Data Strobe, Acknowledge and Size0 (68020)/

Data Transfer Acknowledge (68000 and ST10)/

READY# (386EX)

NDSACK1/

READY

O6T_ft

Data Strobe, Acknowledge and Size1 (68020)/

Data Transfer Acknowledge (Intel)

NAS/

ALE/NADS

I3_ft

Address Strobe(Motorola) /

Address Latch Enable(Intel) / Address Status 386EX

R/W / NWR

I3_ft

Read/Write (Motorola) / Write(Intel)

Pin N°

Symbol

Type

Function

Type

ft: five volts tolerant

fnt: five volts not tolerant

TTL

I1_ft = Input TTL

I2_ft = I1_ft+pull up

I3_ft = I1_ft+hysteresis

I4_ft = I3_ft+pull up

TTL

I/O6 _ft = Input TTL/ Output TTL 6 mA

I5_ft = I3_ft+pull down;

TTL

O3 _ft = Output TTL 3 mA

O3T_ft = O3_ft+Tristate

O6_ft = Output TTL 6mA

TTL

O6D_ft = Output TTL 6mA, Open Drain

O6DT_ft = Output TTL 6mA, Open Drain or Tristate

CMOS

I/O8_fnt = Input TTL, /Output CMOS 8mA;

O8T_fnt = Output CMOS

8mA

I/O8_fnt = Input TTL, /Output CMOS

8mA

CMOS

O4_fnt = Output CMOS 4mA

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