ATSAM9743 datasheet(6/21 Pages) ATMEL

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ATSAM9743

1773B–DRMSD–11/02

Table 3. Double Function Pins

Name #1

Name #2

Pin Number

Function

P0.0 - P0.15

WA[15:0]

48, 51, 52, 55, 56, 58, 60,

63 - 65, 67 - 72

#1 – General-purpose I/O

#2 – External expansion memory address (output)

P1.0 - P1.15

WD[15:0]

83 - 86, 89 - 92, 96 - 98, 1,

2, 6, 8, 9

#1 – General-purpose I/O

#2 – External expansion memory data (I/O)

P2.0

WCS0

#1 – General Purpose I/O

#2 – Expansion ROM chip select (output, active low)

P2.1

WCS1

#1 – General-purpose I/O

#2 – Expansion RAM chip select (output, active low)

P2.2

WOE

#1 – General-purpose I/O

#2 – Expansion memory enable (output, active low)

P2.3

WWE

#1 – General-purpose I/O

#2 – Expansion RAM write enable (output, active low)

P2.4

RBS

#1 – General-purpose I/O

#2 – Expansion RAM byte select, allows connection of

8-bit external SRAM with 16-bit access in two cycles

(output, active low)

P2.5 - P2.9

WA[20:16]

74, 78 - 80, 82

#1 – General-purpose I/O

#2 – Expansion memory address, allows up to 2M x 16

external memory (output)

P2.10

#1 – General-purpose I/O

#2 – Host processor chip select (input, active low)

P2.11

#1 – General-purpose I/O

#2 – Host processor read (input, active low)

P2.12

#1 – General-purpose I/O

#2 – Host processor write (input, active low)

P2.13

#1 – General-purpose I/O

#2 – Host processor data (0) – command/status (1)

select (input)

P2.14

DABD1

#1 – General-purpose I/O

#2 – Secondary DAC serial stereo audio data (output)

P2.15

DAAD0

#1 – General-purpose I/O

#2 – External ADC serial stereo audio data (input)

P3.0 - P3.7

D[7:0]

25, 28, 30, 32, 49, 50, 53,

#1 – General-purpose I/O

#2 – Host processor data bus (I/O)

P3.8

IRQ

#1 – General-purpose I/O

#2 – Host processor interrupt request, active high, tri-

state output

P3.9

RUN

#1 – General-purpose I/O

#2 – High indicates that DSP synthesis is up and

running

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