SAM5708B datasheet(30/89 Pages) ETC1

30 / 89 page

SAM5708B

SAM5708B.pdf

– Rev 14/05/2018

4.3.9. NOR Flash and SRAM as primary function

Pin name

Pin#

Type

Mem

Cfg

Description

MA16-MA18

71-73

Out DR8

1,2,4,5

Address

bits

for

external

SRAM

and

NOR

Flash

memories, extension to 8Mbits (512kx16).

P1.0-P1.2

71-73

I/O 5VT

(PD) DR8

SR3

1,2,4,5

General purpose I/O pin.

MA19-MA26

78-84

Out DR8

1,2

Address bits for external SRAM and NOR Flash memory,

up to 2Gbit (256MByte).

XFR_RDY

Out DR8

1,2

Host parallel interface “Transfer Ready” output. When A1

= 1, this pin is reflecting status of current data read/write.

Before beginning next read/write, host has to check

XFR_RDY is 1

In 5VT

1,2

Host parallel interface address 1:

A1=0 selects mode 0 for communication/control

A1=1 selects mode 1 for fast 8/16bit data transfer

P1.3-P1.10

76,

78-84

I/O 5VT

(PD) DR8

SR3

1,2

General purpose I/O pin.

MWE/

Out DR12

1,2,4,5

External SRAM and NOR Flash memories write enable,

active low.

P1.11

I/O (PU)

DR12 SR3

1,2,4,5

General purpose I/O pin.

MOE/

Out DR8

1,2,4,5

External SRAM and NOR Flash memory output enable,

active low.

P1.12

I/O 5VT

(PU) DR8

SR3

1,2,4,5

General purpose I/O pin.

NRCS0/

Out DR4

1,2

External NOR Flash memory chip select 0, active low.

P1.13

I/O (PU)

DR4 SR3

1,2

General purpose I/O pin.

NRCS1/

Out DR12

1,2

External NOR Flash memory chip select 1, active low.

P1.14

I/O (PU)

DR12

1,2

General purpose I/O pin.

SRCS/

Out DR4

2,4,5

External SRAM memory chip select, active low.

P1.15

I/O (PU)

DR4

2,4,5

General purpose I/O pin.

4.3.10. NAND Flash as primary function

Pin name

Pin#

Type

Mem

Cfg

Description

NDIO0-NDIO6

111-117

I/O DR8

3,4

Data bus for external 8-bit NAND Flash memory.

NDIO7

118

I/O DR4

NDCE0/

Out DR12

3,4

External NAND Flash memory chip select 0, active low

NDCE1/

Out DR4

3,4

External NAND Flash memory chip select 1, active low

P3.12

I/O (PU)

DR4

3,4

General purpose I/O pin.

NDR|B/

100

In 5VT

3,4

External NAND Flash Ready Busy/ status.

Indicates target array activity. External pull-up resistor is

needed if NAND Flash R|B/ is open-drain output.

NDALE

101

Out DR8

3,4

External NAND Flash Address Latch Enable.

Load an address from I/O[7:0] into the address register.

NDCLE

102

Out DR8

3,4

External NAND Flash Command Latch Enable.

Load a command from I/O[7:0] into the command register

NDWE/

103

Out DR8

3,4

External NAND Flash Write Enable.

Transfer

commands,

address,

and

serial

data

from

SAM5708B to the NAND Flash.

NDRE/

104

Out DR4

3,4

External NAND Flash Read Enable.

Transfer serial data from the NAND Flash to SAM5708B.

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