CP2201 datasheet(75/108 Pages) SILABS

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CP2200/1

Rev. 1.0

13.3. Flash Access Registers

The CP2200 Flash is accessed through the registers in Table 17. See the register tables following Table 17 for

detailed register descriptions

Table 19. Flash Access Register Summary

Long Name

Address

Description

FLASHSTA

Flash Status

0x7B

Used to determine the status of a Flash write

or erase operation.

FLASHKEY

Flash Lock and Key

0x67

Write-only register allowing the host to

unlock the Flash for writing or erasing.

FLASHADDRH

FLASHADDRL

Flash Address Register High and

Low Bytes

0x69

0x68

16-bit Address used for Flash operations.

FLASHDATA

Flash Read/Write Data Register

0x06

Data register used for writing or reading a

single byte of Flash.

FLASHAUTORD Flash AutoRead Data Register

0x05

Data register used for reading a block of

sequential data stored in Flash. Each read

from this register increments the Flash

address register by 1.

FLASHERASE

Flash Erase

0x6A

Initiates a Flash erase operation.

Note: To determine when a Flash operation completes, the FLBUSY bit should be polled or software should

wait for the Flash Write/Erase Operation Complete Interrupt to occur.

Bits 7–4: UNUSED. Read = 0000b, Write = don’t care.

Bit 3:

FLBUSY: FLASH Busy Indicator

This bit indicates when a FLASH write or erase operation is in progress.

0: FLASH is idle.

1: FLASH write/erase operation is currently in progress.

Bit 2:

Reserved.

Bit 1:

FLWRITE: FLASH Write

0: The last Flash operation completed was not a Flash write.

1: The last Flash operation completed was a Flash write.

Bit 0:

FLERASE: FLASH Erase

0: The last Flash operation completed was not a Flash erase.

1: The last Flash operation completed was a Flash erase.

R/W

Reset Value

—

FLBUSY Reserved FLWRITE FLERASE 00000000

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Address:

0x7B

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