EM357-RTR datasheet(32/241 Pages) SILABS

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Rev 1.3

Table 5.2. Option Byte Write Protection Bit Map

Option Byte

Bit

Notes

Option Byte 0

bit [7:0]

Read protection of all flash (MFB, FIB, CIB)

Option Byte 1

bit [7:0]

Reserved for Silicon Labs use

Option Byte 2

bit [7:0]

Available for customer use

Option Byte 3

bit [7:0]

Available for customer use

Option Byte 4

bit [0]

Write protection of address range 0x08000000 – 0x08001FFF

bit [1]

Write protection of address range 0x08002000 – 0x08003FFF

bit [2]

Write protection of address range 0x08004000 – 0x08005FFF

bit [3]

Write protection of address range 0x08006000 – 0x08007FFF

bit [4]

Write protection of address range 0x08008000 – 0x08009FFF

bit [5]

Write protection of address range 0x0800A000 – 0x0800BFFF

bit [6]

Write protection of address range 0x0800C000 – 0x0800DFFF

bit [7]

Write protection of address range 0x0800E000 – 0x0800FFFF

Option Byte 5

bit [0]

Write protection of address range 0x08010000 – 0x08011FFF

bit [1]

Write protection of address range 0x08012000 – 0x08013FFF

bit [2]

Write protection of address range 0x08014000 – 0x08015FFF

bit [3]

Write protection of address range 0x08016000 – 0x08017FFF

bit [4]

Write protection of address range 0x08018000 – 0x08019FFF

bit [5]

Write protection of address range 0x0801A000 – 0x0801BFFF

bit [6]

Write protection of address range 0x0801C000 – 0x0801DFFF

bit [7]

Write protection of address range 0x0801E000 – 0x0801FFFF

Option Byte 6*

bit [0]

Write protection of address range 0x08020000 – 0x08021FFF

bit [1]

Write protection of address range 0x08022000 – 0x08023FFF

bit [2]

Write protection of address range 0x08024000 – 0x08025FFF

bit [3]

Write protection of address range 0x08026000 – 0x08027FFF

bit [4]

Write protection of address range 0x08028000 – 0x08029FFF

bit [5]

Write protection of address range 0x0802A000 – 0x0802BFFF

bit [6]

Write protection of address range 0x0802C000 – 0x0802DFFF

bit [7]

Write protection of address range 0x0802E000 – 0x0802FFFF

Option Byte 7

bit [7:0]

Reserved for Silicon Labs use

*Note:

Option byte 6 is reserved/unused in the EM351 due to the smaller flash size.

EM357-RTR Datasheet(PDF) 32 Page - Silicon Laboratories

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