MAC7200 datasheet(443/976 Pages) FREESCALE

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PFLASH Application Usage

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

365

NOTE

RWSC = 0 is allowed, however you must set APC = 0 and you must set the

MCR[PRD] bit = 1. This PRD bit is a H7Fb configuration bit that is located

in the H7Fb MCR register bit [7].

Example — APC and RWSC Valid Configurations

The following table shows the valid configurations of APC and RWSC given a 25MHz frequency and the

rules above. All other configurations are invalid and will cause errors

Table 18-5 shows the settings for the APC and RWSC fields, given a few frequencies. These values were

calculated using the following formulas:

Table 18-4. Flash PFCR1 Register Settings

Field

PFCR1 Bits

Allowed Values

Reserved

31:18

M1PFE

{0,1}

M0PFE

{0,1}

APC

15:13

{RWSC-1,...,7}

WWSC

12:11

{1,3}

RWSC

10:8

{0,...,7}

Reserved

DPFEN

{0,1}

Reserved

IPFEN

{0,1}

Reserved

PFLIM

2:1

{0,1,2,3}

BFEN

{0,1}

APC

RWSC

{0,1,2,3,4,5,6,7}

{1,2,3,4,5,6,7}

{2,3,4,5,6,7}

{3,4,5,6,7}

{4,5,6,7}

{5,6,7}

{6,7}

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