L99LD02 datasheet(34/66 Pages) STMICROELECTRONICS

34 / 66 page

Serial peripheral interface (ST SPI standard)

L99LD02

34/66

DS12448 Rev 3

The Device Identification Registers represent a unique number identifying device part-

number.

By reading out the <SPI Mode> register, general information of SPI usage of the Device

Application Registers can be read.

The SPI Burst Read bit indicates if a burst read operation is implemented.

The L99LD02 does not feature SPI Burst Read.

The SPI Data Length value indicates the length of the SCK count monitor which is running

for all accesses to the Device Application Register. In case of a communication frame with

an SCK count not equal to the reported one, this will lead to a SPI Error and the data will be

rejected.

The default frame size of the L99LD02 is 32 bits, so the SPI Data Length bits are read as

‘011’.

For the L99LD02, a Data Consistency Check by parity check is implemented, therefore

these bits are read as ‘01’. An odd parity bit is used and it is calculated over the complete

communication frame.

The GSB Options byte indicates that device-specific status information is used instead of

the predefined one. In case a bit of the GSB is not used, it has to be fixed to ‘0’ value and is

indicated by a logical ‘1’ in the GSB Options byte.

14h

WD bit pos. 2

D7h

11010111b

Bit7,WB1 = 1

Bit6,WB0 = 1

Bit position of the WD bit

within the corresponding

configuration register

= 23d = 010111b

20h

SPI CPHA Test

55h

01010101b

Predefined by ST SPI V4.1, it

is used to verify that the SCK

Phase of the SPI master is set

correctly

3Eh

GSB Options

00h

00000000b All bits of GSB are used

3Fh

Advanced

Operation Code

00h

00000000b

Access to this address

provokes a SW reset (all

control registers are set to

their default values; in

addition, all status registers

are cleared too).

NOTE: Data field should not

be “all ones”, otherwise an

“SDI stuck at” error occurs.

Table 21. ROM Memory Map (continued)

Address

Name

Access

Content

(hex)

Content

(bin)

Comments

L99LD02 датащи(PDF) 34 Page - STMicroelectronics

L99LD02 датащи(HTML) 34 Page - STMicroelectronics

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

датащи скачать

ссылки URL