26HS01GTAM03 datasheet(34/166 Pages) INFINEON

34 / 166 page

Datasheet

34 of 166

002-12337 Rev. *Y

2022-01-18

256Mb/512Mb/1Gb SEMPER™ Flash

HYPERBUS™ interface, 1.8V/3.0V

Features

4.3

Interface CRC

Interface CRC performs a hardware accelerated CRC calculation on the communication between a host and the

device, ensuring the integrity of information transferred. A CRC is an error-detecting code commonly used in

devices to detect accidental changes to raw data.

The Interface CRC method in HL-T/HS-T family devices relies entirely on the host to verify the CRC check-value

and take appropriate actions. The device calculates the CRC check-value which the host reads using the Read

Interface CRC transaction (RDCRC_4_0, RICRC_1_1). The check-value calculated includes all transaction contents

while CS# is LOW, namely command, address and data. This CRC checksum can be generated across either a

single transaction or a set of transactions. The only limitation is that the data size over which the slave is calcu-

lating the CRC checksum must be less than 232 bits.

The host must also calculate the CRC check-value over the same transaction sequence. When ready, the host can

read the device’s calculated CRC check-value and compare it with its own. If there is a mismatch, the host can

choose to repeat the complete transaction sequence.

Figure 22

CRC calculation overview

Note At the end of the CRC read transaction, the device resets the CRC check-value and reinitializes the CRC

polynomial.

CRC32 Polynomial: X32 + X28 + X27 + X26 + X25 + X23 + X22 + X20 + X19 + X18 + X14 + X13 + X11 + X10 + X9 + X8 + X6 + 1

Notes

• The CRC polynomial between the host and the device must be identical.

• The Interface CRC check-value will reset to 0xFFFFFFFFh under the following conditions:

-POR

-Hardware Reset

-Software Reset

- CS# Signaling Reset

- A read of the Interface CRC check-value

- Exit from Deep Power Down

• If a transaction is aborted before the command is legally received, i.e. the transfer length is cut short by CS#

deasserting early - the transferred data will still be clocked into the CRC check-value, but it is no longer

guaranteed. When using Interface CRC, only valid, non-aborted transactions must be used.

• It is required to read Interface CRC value before any Volatile Status Register read and Clear Interface CRC value

after any volatile Status Register read(s).

• When Interface CRC is disabled, the interface CRC Register value becomes indeterminate. It is recommended

to read the interface CRC Register before disabling the interface CRC feature, and again after enabling the

interface CRC feature to re-initialize the CRC calculation.

CS#

Command

(16 Bits)

Address

(32 Bits)

Read Data

(n Bits)

Command

(16 Bits)

Address

(32 Bits)

Write Data

(n Bits)

DQ[7:0]

Read Transaction

Program Transaction

CRC32 - Equation

CRC Read

Every 32-bits of data is shifted into

CRC32 and the Checksum is updated

26HS01GTAM03 数据表(PDF) 34 Page - Infineon Technologies AG

26HS01GTAM03 数据表(HTML) 34 Page - Infineon Technologies AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

数据表下载