L9396 datasheet(91/109 Pages) STMICROELECTRONICS

Nome de Peças	L9396

Descrição Electrónicos	Automotive multiple power supply IC

PDF	109 Pages

Scroll/Zoom	100%

Fabricante Electrônico	STMICROELECTRONICS [STMicroelectronics]

Página de início	http://www.st.com

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91 / 109 page

DS12539 Rev 6

91/109

L9396

Serial Peripheral Communication

108

8.3

SPI registers

The register table is on 10 pages containing 16 registers each. Address 3 MSBs indicate

page selection, the remaining address 4 LSBs indicates the register.

Maximum word length of registers is 20 bits.

The bits colored in gray are called safe registers.

After the safe registers set has been written, the MCU sends a lock frame writing the lock

word h-AAAAA into the write-protection register (address b-1000010).

From now on, it's mandatory to write consecutively the unlock words h-55555 (first access)

and h-33333 (second access) into the write-protection register in order to write again the

safe registers set.

The write-protection register echo (SDO) reports the lock-state: h-AAAAA in case of lock or

h-55555 in case of unlock.

The write-protection register initial status is unlock.

The summary of the registers is defined in Table 60.

L9396 Folha de dados(PDF) 91 Page - STMicroelectronics