User Manual

ManualsBrandsdresden elektronik ingenieurtechnik ManualsElectronics2.4GHz IEEE 802.15.4 compliant radio module

datasheet

Version 0.9

2017-09-13

deRFsamR21E-23S00/-23S20 datasheet

www.dresden-elektronik.de

Page 16 of 36

7. Onboard SPI Serial Flash

The module incorporates a 4 MBit data flash connected to the module by SPI bus. The data

flash connects to PA16-PA19 according to Table 9-1.

Table 9-1: Dataflash to microcontroller connection

Port

Function

Flash pin

Controller settings

PA16

MISO

PA16 SERCOM1 or 3 PAD[0] DIPO=0x0

PA17

SCK

PA17 SERCOM1 or 3 PAD[1] DOPO=0x2

PA18

GPIO

PA18 to be set low in software before SPI access

PA19

MOSI

PA19 SERCOM1 or 3 PAD[3] DOPO=0x2

The signals in this table are available at module pins 7-10 as well. The module contains the

serial data flash AT25SF041 according to Table 9-2. Since the memory market is very

difficult at the moment, the module incorporates some alternative flash devices listed in

Table 9-3. This is done to avoid supply bottlenecks. To avoid problems, no specific flash ID

shall be used in the customer firmware. This section outlines basic usage instructions. For a

more detailed description refer to the datasheets of the flash devices.

Table 9-2: default serial data flash

Partnumber

Manufacturer

JEDEC ID (9Fh)

Datasheet reference

AT25SF041

Adesto

1F-84-01

[9]

Table 9-3: second source serial data flash list

Partnumber

Manufacturer

JEDEC ID (9Fh)

Datasheet reference

MX25V4006E

Macronix

C2-20-13

[10]

W25X40CL

Winbond

EF-30-13

[11]

W25Q40CL

Winbond

EF-40-13

[12]

7.1. Commands

To ease the implementation of the different flash devices Table 9-4 lists the commands and

their respective opcodes common to all the flash devices listed above.

Table 9-4: command table common to all flash options

Command

Opcode

Byte 2

Byte 3

Byte 4

Byte 5

Byte 6

Byte n

Write enable

06h

Write disable

04h

Read Status Register

05h

(S7-S0)

Write Status Register

01h

S7-S0

see*

Page Program

02h

A23-A16

A15-A8

A7-A0

(D7-D0)

(next

byte)

Up to 256

bytes

Sector Erase (4kB)

20h

A23-A16

A15-A8

A7-A0

Block Erase (64kB)

D8h

A23-A16

A15-A8

A7-A0

Chip Erase

C7h/60h

Power-down

B9h

Resume from Deep

Power Down

ABh

Resume from Deep

Power Down and

read ID

ABh

dummy

(IRD7-

IRD0)