include/flash/at45.h File Reference

AT45 DataFlash(R) Definions. More...

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Defines
#define	AT45_PAGE_ADDR_MASK   ((1 << 13) - 1)
	Mask for AT45 page address (13-bit).
#define	AT45_PAGE_POS_MASK   ((1 << 11) - 1)
	Mask for AT45 page position (11-bit).
#define	AT45_ATMEL_JEDEC_ID   0x1f
	Atmel AT45 JEDEC ID.
#define	AT45_DATAFLASH_FAMILY_CODE   0x20
	DataFlash familty code.
#define	AT45_FAMILY_CODE_MASK   0xe0
	Mask for AT45 family code.
#define	AT45_DENSITY_CODE_MIN   2
	Minimum AT45 density code.
#define	AT45_DENSITY_CODE_MAX   8
	Maximum AT45 density code.
#define	AT45_DENSITY_CODE_MASK   0x1f
	Mask for AT45 density code.
#define	AT45_DENSITY_CODE_0_DEVICE_SIZE   0x8000L
	The device size in bytes for density code 0.
#define	AT45_PAGE_SIZE_ID_0_SIZE   256
	The page size in bytes for page size id 0.
AT45 segmentation defines
This can be used to build up a singel byte of information containing information on page size, sector size and device size.
#define	AT45_PS_256   (0 << 0)
	Page size 256 bytes.
#define	AT45_PS_512   (1 << 0)
	Page size 512 bytes.
#define	AT45_PS_1024   (2 << 0)
	Page size 1024 bytes.
#define	AT45_PS_MASK   (7 << 0)
	Page size mask bits.
#define	AT45_SS_128P   (0 << 3)
	Sector size 128 pages.
#define	AT45_SS_256P   (1 << 3)
	Sector size 256 bytes.
#define	AT45_SS_MASK   (3 << 3)
	Sector size mask bits.
#define	AT45_DS_4S   (0 << 4)
	Device size 4 sectors.
#define	AT45_DS_8S   (1 << 4)
	Device size 8 sectors.
#define	AT45_DS_16S   (2 << 4)
	Device size 16 sectors.
#define	AT45_DS_32S   (3 << 4)
	Device size 32 sectors.
#define	AT45_DS_64S   (4 << 4)
	Device size 64 sectors.
#define	AT45_DS_MASK   (7 << 4)
AT45 devices size information bitmask
Associates AT45 device type to a bitmask with size information
#define	AT45DB011D   (AT45_PS_256 | AT45_SS_128P | AT45_DS_4S)
	Size definitions for AT45DB011D.
#define	AT45DB021D   (AT45_PS_256 | AT45_SS_128P | AT45_DS_8S)
	Size definitions for AT45DB021D.
#define	AT45DB041D   (AT45_PS_256 | AT45_SS_256P | AT45_DS_8S)
	Size definitions for AT45DB031D.
#define	AT45DB081D   (AT45_PS_256 | AT45_SS_256P | AT45_DS_16S)
	Size definitions for AT45DB081D.
#define	AT45DB161D   (AT45_PS_512 | AT45_SS_256P | AT45_DS_16S)
	Size definitions for AT45DB161D.
#define	AT45DB321D   (AT45_PS_512 | AT45_SS_128P | AT45_DS_64S)
	Size definitions for AT45DB321D.
#define	AT45DB642D   (AT45_PS_1024 | AT45_SS_256P | AT45_DS_32S)
	Size definitions for AT45DB641D.
Enumerations
enum	at45_cmd {   AT45_CMD_CONTINOUS_ARRAY_READ = 0x0b, AT45_CMD_MAIN_MEMORY_TO_BUFFER_1_TRANSFER = 0x53, AT45_CMD_BUFFER_1_MAIN_MEMORY_PROGRAM_WITH_ERASE = 0x83, AT45_CMD_BUFFER_1_WRITE = 0x84,   AT45_CMD_READ_ID = 0x9f, AT45_CMD_READ_STATUS_REG = 0xd7 }
	AT45 Commands. More...
enum	at45_status_bit { AT45_STATUS_PAGE_SIZE = 0, AT45_STATUS_PROTECT = 1, AT45_STATUS_COMP = 6, AT45_STATUS_RDY = 7 }
	AT45 status register bits. More...
Functions
static bool	at45_is_atmel_jedec_id (uint8_t manuf_id)
	Test if AT45 mamufacturer ID is Atmel's.
static bool	at45_is_dataflash_family_code (uint8_t device_id1)
	Test if AT45 device ID is DataFlash family.
static uint8_t	at45_get_density_code (uint8_t device_id1)
	Get AT45 density code from Device ID 1.
static bool	at45_is_valid_density_code (uint8_t device_id1)
	Test if AT45 device ID have a valid density code.
static bool	at45_is_valid_id (uint8_t manuf_id, uint8_t device_id1)
	Test if AT45 device ID is DataFlash family.
static uint32_t	at45_get_size (uint8_t device_id1)
	Get AT45 device size from Device ID 1.
static uint32_t	at45_get_page_size (uint8_t device_id1)
	Get AT45 device page size from Device ID 1.
Variables
static const uint8_t	at45_density_table []
	AT45 density code to device size information translation table.

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Detailed Description

AT45 DataFlash(R) Definions.

Copyright (C) 2009 Atmel Corporation. All rights reserved.

Definition in file at45.h.