SC312XDP512F0MPVR datasheet(1216/1348 Pages) FREESCALE

номер детали	SC312XDP512F0MPVR

подробное описание детали	HCS12X Microcontrollers

PDF	1348 Pages

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производитель	FREESCALE [Freescale Semiconductor, Inc]

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1216 / 1348 page

Chapter 29 128 Kbyte Flash Module (S12XFTX128K1V1)

MC9S12XDP512 Data Sheet, Rev. 2.21

1218

Freescale Semiconductor

29.4.2.3

Program Command

The program operation will program a previously erased word in the Flash memory using an embedded

algorithm.

An example ﬂow to execute the program operation is shown in Figure 29-26. The program command write

sequence is as follows:

1. Write to a Flash block address to start the command write sequence for the program command. The

data written will be programmed to the address written.

2. Write the program command, 0x20, to the FCMD register.

3. Clear the CBEIF ﬂag in the FSTAT register by writing a 1 to CBEIF to launch the program

command.

If a word to be programmed is in a protected area of the Flash block, the PVIOL ﬂag in the FSTAT register

will set and the program command will not launch. Once the program command has successfully launched,

the CCIF ﬂag in the FSTAT register will set after the program operation has completed unless a new

command write sequence has been buffered. By executing a new program command write sequence on

sequential words after the CBEIF ﬂag in the FSTAT register has been set, up to 55% faster programming

time per word can be effectively achieved than by waiting for the CCIF ﬂag to set after each program

operation.

SC312XDP512F0MPVR датащи(PDF) 1216 Page - Freescale Semiconductor, Inc