MCP79520 datasheet(32/50 Pages) MAS

部件名	MCP79520

功能描述	3V SPI Real-Time Clock Calendar with Battery Switchover

PDF	50 Pages

Scroll/Zoom	100%

制造商	MAS [Micro Analog systems]

网页	http://www.mas-oy.com

标志

32 / 50 page

MCP7952X/MCP7951X

DS22300A-page 32

Preliminary

 2012 Microchip Technology Inc.

9.1.7

WRITE STATUS REGISTER

(SRWRITE)

The Write Status Register (SRWRITE) instruction

allows the user to select one of four levels of protec-

tion for the array by writing to the appropriate bits in

the STATUS register. The array is divided up into four

segments. The user has the ability to write-protect

none, one, two, or all four of the segments of the array.

The partitioning is controlled as shown in Table 9-2.

See Figure 9-6 for the SRWRITE timing sequence.

TABLE 9-2:

ARRAY PROTECTION

FIGURE 9-6:

WRITE STATUS REGISTER TIMING SEQUENCE

BP1

BP0

Array Addresses

Write-Protected

(2 kbit shown)

none

upper 1/4

(C0h-FFh)

upper 1/2

(80h-FFh)

all

(00h-FFh)

1011

131415

Instruction

Data to STATUS Register

High-Impedance

SCK

23456

TWC

MCP79520 数据表(PDF) 32 Page - Micro Analog systems

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