This is the documentation for the latest (main) development branch of Zephyr. If you are looking for the documentation of previous releases, use the drop-down menu on the left and select the desired version.

atmel,at45 (on spi bus)

Vendor: Atmel Corporation

Description

Atmel AT45 (or compatible) SPI flash

Properties

Properties not inherited from the base binding file.

Name

Type

Details

jedec-id

uint8-array

 
JEDEC ID as manufacturer ID (1 byte) and device ID (2 bytes).

This property is required.

size

int

 
Flash capacity in bits.

This property is required.

sector-size

int

 
Flash sector size in bytes.

This property is required.

block-size

int

 
Flash block size in bytes.

This property is required.

page-size

int

 
Flash page size in bytes.

This property is required.

use-udpd

boolean

 
When set, the driver will use the Ultra-Deep Power-Down command instead
of the default Deep Power-Down one to put the chip into low power mode.

From the driver perspective, as it does not rely on the contents of the
SRAM buffers in the chip, the difference between the Deep and Ultra-Deep
Power-Down modes is that the chip consumes far less power in the latter
but needs some more time to enter this mode and to exit from it.

enter-dpd-delay

int

 
Time, in nanoseconds, needed by the chip to enter the Deep Power-Down
mode (or Ultra-Deep Power-Down mode when the "use-udpd" property is set)
after the corresponding command is issued.

exit-dpd-delay

int

 
Time, in nanoseconds, needed by the chip to exit from the Deep Power-Down
mode (or Ultra-Deep Power-Down mode when the "use-udpd" property is set)
after the corresponding command is issued.

reset-gpios

phandle-array

 
The RESET pin of AT45 is active low.
If connected directly the MCU pin should be configured
as active low.

wp-gpios

phandle-array

 
The WP pin of AT45 is active low.
If connected directly the MCU pin should be configured
as active low.

spi-max-frequency

int

 
Maximum clock frequency of device's SPI interface in Hz

This property is required.

supply-gpios

phandle-array

 
GPIO specifier that controls power to the device.

This property should be provided when the device has a dedicated
switch that controls power to the device.  The supply state is
entirely the responsibility of the device driver.

Contrast with vin-supply.

vin-supply

phandle

 
Reference to the regulator that controls power to the device.
The referenced devicetree node must have a regulator compatible.

This property should be provided when device power is supplied
by a shared regulator.  The supply state is dependent on the
request status of all devices fed by the regulator.

Contrast with supply-gpios.  If both properties are provided
then the regulator must be requested before the supply GPIOS is
set to an active state, and the supply GPIOS must be set to an
inactive state before releasing the regulator.