MCP795B10 MAS [Micro Analog systems], MCP795B10 Datasheet - Page 35

• Manufacturer Part Number: MCP795B10
• Description: SPI Real-Time Clock Calendar
• Manufacturer: MAS [Micro Analog systems]

9.1.9
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
See
TABLE 9-2:
FIGURE 9-6:
 2011 Microchip Technology Inc.
SCK
SO
CS
BP1
Figure 9-6
SI
0
0
1
1
WRITE STATUS REGISTER
(SRWRITE)
for the SRWRITE timing sequence.
0
0
ARRAY PROTECTION
BP0
0
1
0
1
0
WRITE STATUS REGISTER TIMING SEQUENCE
1
0
2
Instruction
Array Addresses
Write-Protected
(2 kbit shown)
0
3
(C0h-FFh)
(80h-FFh)
(00h-FFh)
upper 1/4
upper 1/2
none
0
all
4
Table
0
5
9-2.
MCP795WXX/MCP795BXX
High-Impedance
Preliminary
0
6
1
7
7
8
6
9
Data to STATUS Register
10
5
11
4
12
3
13
2
14
1
DS22280A-page 35
15
0
T
WC