MCP79521 datasheet(39/58 Pages) MICROCHIP

Il numero della parte	MCP79521

Spiegazioni elettronici	Battery-Backed SPI Real-Time Clock/Calendar

PDF	58 Pages

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Produttore elettronici	MICROCHIP [Microchip Technology]

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DS20002300D-page 39

MCP7951X/MCP7952X

FIGURE 6-4:

WRITE STATUS REGISTER SEQUENCE

6.2.2

STATUS REGISTER READ

SEQUENCE

The Read Status Register instruction (SRREAD)

provides access to the STATUS register. The STATUS

cycle. This allows the user to poll the WIP bit to

determine when a write cycle is complete.

The device is selected by pulling CS low. The 8-bit

SRREAD instruction is transmitted to the MCP795XX.

The STATUS register value is then shifted out on the

SO pin. The read operation is terminated by driving CS

high (Figure 6-5).

FIGURE 6-5:

READ STATUS REGISTER SEQUENCE

1011

12131415

7654

Instruction

Data to STATUS Register

High-Impedance

SCK

234

567

1011

12131415

Instruction

Data from STATUS Register

High-Impedance

SCK

234

567

MCP79521 Scheda tecnica(PDF) 39 Page - Microchip Technology