STLC5464 查看數據表（PDF） - STMicroelectronics

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STLC5464

MULTI-HDLC WITH n x 64 SWITCHING MATRIX ASSOCIATED

STMicroelectronics 

STLC5464

I - PIN INFORMATION (continued)

I.2 - Pin Description (continued)

Pin N° Symbol Type

Function

MEMORY INTERFACE (continued)

140

DM0

I/O Memory Data bit 0

141

DM1

I/O Memory Data bit 1

142

DM2

I/O Memory Data bit 2

143

DM3

I/O Memory Data bit 3

144

DM4

I/O Memory Data bit 4

147

DM5

I/O Memory Data bit 5

148

DM6

I/O Memory Data bit 6

149

DM7

I/O Memory Data bit 7

150

DM8

I/O Memory Data bit 8

151

DM9

I/O Memory Data bit 9

152

DM10

I/O Memory Data bit 10

153

DM11

I/O Memory Data bit 11

154

DM12

I/O Memory Data bit 12

155

DM13

I/O Memory Data bit 13

156

DM14

I/O Memory Data bit 14

157

DM15

I/O Memory Data bit 15

160

NTEST

I2 Test Control. When this pin is at 0V each output is high impedance except XTAL2 Pin.

Type : I1 = Input TTL ;

I2 = I1 + Pull-up ;

O4 = Output CMOS 4mA ;

O4T = O4 + Tristate ;

O8D = Output CMOS 8mA, Open Drain ;

O8T = Output CMOS 8mA, Tristate

I3 = I1 + Hysteresis ;

I4 = I3 + Pull-up ;

O8 = Output CMOS 8mA, ”1” and ”0” at Low Impedance ;

O8DT = Output CMOS 8mA, Open Drain or Tristate ;

Note : D0/15 input/output pins must be connected to one single external pull up resistor if not used.

I.3 - Pin Definition

I.3.1 - Input Pin Definition

I1 : Input 1 TTL

I2 : Input 2 TTL + pull-up

I3 : Input 3 TTL + hysteresis

I4 : Input 4 TTL + hysteresis +pull-up

I.3.2 - Output Pin Definition

O4 : Output CMOS 4mA

O4T : Output CMOS 4mA, Tristate

O8 : Output CMOS 8mA

O8T : Output CMOS 8mA,Tristate

O8D : Output CMOS 8mA,Open Drain

O8DT : Output CMOS 8mA,Open Drain or Tristate (Programmable pin)

Moreover, each output is high impedance when the NTEST Pin is at 0 volt except XTAL2 Pin.

I.3.3 - Input/Output Pin Definition

I/O : Input TTL/ Output CMOS 8mA.

N.B. XTAL1 : this input is CMOS.

XTAL2 : NTEST pin at 0 has no effect on this pin.

13/83

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