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PROGRAMMING EXAMPLES

A[3:0]

D[3:0]

WE

UPD

Figure 25. Sample Timing Diagram for 4x4 Mode Programming Examples

DUAL 2 × 2 MODE (MODE PIN = 1) PROGRAMMING EXAMPLES

Table 9. Dual 2 × 2 Mode Programming

Address Pins

Data Pins

A3

A2

A1

A0

D3

D2

D1

D0

Description

1

0

0

0

0

x

x

x

A[3] = 1 enables OUT3. D[3] = 0 connects IN2 to OUT3.

1

0

0

0

1

x

x

x

A[3] = 1 enables OUT3. D[3] = 1 connects IN3 to OUT3.

1

1

0

0

0

0

x

x

A[3:2] = b11 enables OUT2 and OUT3. D[3:2] = b00 connects IN2 to both OUT2 and OUT3.

1

1

0

0

1

0

x

x

A[3:2] = b11 enables OUT2 and OUT3. D[3:2] = b10 connects IN2 to OUT2 and connects IN3

to OUT3.

0

0

1

0

x

x

0

x

A[1] = 1 enables OUT1. D[1] = 0 connects IN0 to OUT1.

0

0

1

1

x

x

1

1

D[1:0] = b11 enables OUT0 and OUT1. D[1:0] = b11 connects IN1 to both OUT0 and OUT1.

1

1

1

1

0

1

0

1

A[3:0] = b1111 enables all outputs. D[3:0] = b0101 connects IN2 to OUT3, IN3 to OUT2, IN0 to

OUT1, IN1 to OUT0.

4 × 4 MODE (MODE PIN = 0) PROGRAMMING EXAMPLES

Table 10. Connectivity Programming, A[3:2] = b00

Address Pins

Data Pins

A3

A2

A1

A0

D3

D2

D1

D0

Description

0

0

0

0

0

1

0

0

A[1:0] = 0 selects OUT0. D2 = 1 enables OUT0. D[1:0] = 0 connects IN0 to OUT0.

0

0

0

0

0

0

0

0

A[1:0] = 0 selects OUT0. D2 = 0 disables OUT0. D[1:0] = 0 connects IN0 to OUT0.

0

0

1

0

0

1

0

1

A[1:0] = b10 selects OUT2. D2 = 1 enables OUT2. D[1:0] = b01 connects IN1 to OUT2.

0

0

1

1

0

1

0

0

A[1:0] = b11 selects OUT3. D2 = 1 enables OUT3. D[1:0] = b00 connects IN0 to OUT3.

Table 11. Output Level Programming, A[3:2] = b01

Address Pins

Data Pins

A3

A2

A1

A0

D3

D2

D1

D0

Description (Output Current = 2 mA + (2 mA × D[3:0])

0

1

0

0

0

1

0

0

A[1:0] = 0 selects OUT0. D[3:0] = b0100 sets OUT0 current to 2 mA + (2 mA × 4) = 10 mA.

0

1

0

0

1

0

0

0

A[1:0] = 0 selects OUT0. D[3:0] = b1000 sets OUT0 current to 2 mA + (2 mA × 8) = 18 mA.

0

1

1

0

1

1

0

1

A[1:0] = b10 selects OUT2. D[3:0] = b1101 sets OUT2 current to 2 mA + (2 mA × 13) = 28 mA.

0

1

1

1

0

0

0

0

A[1:0] = b11 selects OUT3. D[3:0] = b0000 sets OUT3 current to 2 mA + (2 mA × 0) = 2 mA.