UM1653 datasheet(10/45 Pages) STMICROELECTRONICS

10 / 45 page

STM32 NAND driver blocks

UM1653

10/45

DocID025024 Rev 1



The Logical Index contains the logical address of the block.



The Block Status returns the status of the block if it is valid or not.



The Data Status informs if the page is valid or invalid.



Wear Leveling Counter is the number of times the block has been erased.



The ECC is the error correction code calculated for each page.

NAND INTERFACE



x8 or x16 bus width



Multiplexed Address/ Data



Pinout compatibility for all densities

SUPPLY VOLTAGE



1.8V device: VCC = 1.65 to 1.95V



3.0V device: VCC = 2.7 to 3.6V

PAGE SIZE



x8 device: (512 + 16 spare) Bytes



x16 device: (256 + 8 spare) Words



x8 device: (2048 + 64 spare) Bytes



x16 device: (1024 + 32 spare) Words

1.5

NAND pin mapping

I/O 8-15

Data Input/Outputs: for x16 devices. The I/O pins are used to input data,

address, command and output data during read operation.

I/O 0-7

Data Input/Outputs: Address Inputs, or Command Inputs for x8 and x16 devices.

ALE

Address Latch Enable: When active, an address can be written.

CLE

Command Latch Enable: This pin should be LOW while writing commands to the

command register.

CE/

Chip Enable: The CE input enables the device. Signal is active low. If the signal

is inactive the device will be in standby.

RE/

Read Enable: The RE input is the serial data out control. Signal is active low to

out data.

RB/

Ready/Busy (open-drain output) The RB output provides the status of the device

operation. It is an open drain output, hence should be connected to a GPIO with

pull-up.



LOW: a program, erase or read operation is in process.



HIGH: the process is complete.

WE/

Write Enable: The WE input controls write operations to I/O port. Commands,

data and address are latched on the rising edge of WE.

WP/

Write Protect: Typically connected to Vcc, but may also be connected to a GPIO.

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