10.1 Operations

NVM write operations are controlled by selecting the desired action with the NVMCMD bits and then starting the operation by executing the unlock sequence. NVM read operations are started by setting the GO bit after setting the read operation. Available NVM operations are shown in the following table.

Table 10-1. NVM Operations
NVMCMD	Unlock	Operation	DFM	PFM	Source/Destination	WRERR	INT
`000`	No	Read	byte	word	NVM to NVMDAT	No	No
`001`	No	Read and Post Increment	byte	word	NVM to NVMDAT	No	No
`010`	No	Read Page	—	page	NVM to Buffer RAM	No	No
`011`	Yes	Write	byte	word	NVMDAT to NVM	Yes	Yes
`100`	Yes	Write and Post Increment	byte	word	NVMDAT to NVM	Yes	Yes
`101`	Yes	Write Page	—	page	Buffer RAM to NVM	Yes	Yes
`110`	Yes	Erase Page	—	page	n/a	Yes	Yes
`111`	No	Reserved (No Operation)	—	—	—	No	No

Important: When the GO bit is set, writes operations are blocked on all NVM registers. The GO bit is cleared by hardware when the operation is complete. The GO bit cannot be cleared by software.