參數(shù)資料
型號(hào)： FTS64K
廠商： 飛思卡爾半導(dǎo)體(中國(guó))有限公司
英文描述： 50/MDR/RECP/VERT PRS FIT/M2.6/SCW/30 MIN
中文描述： 64K的快閃記憶體字節(jié)
文件頁(yè)數(shù)： 23/44頁(yè)
文件大小： 401K
代理商： FTS64K
23
The FPROT register is readable in user and special modes. Bit NV6 is not writable. FPOPEN, FPHDIS
and FPLDIS bits in the FPROT register can only be written to the protected state (i.e. 0). FPLS[1:0] can
be written anytime until bit FPLDIS is cleared. FPHS[1:0] bits can be written anytime until bit FPHDIS is
cleared. If the FPOPEN bit is cleared, then the state of the FPHDIS, FPHS[1:0], FPLDIS and FPLS[1:0]
bits is irrelevant. The FPROT register is loaded from Flash address $FF0D during reset.
To change the Flash protection that will be loaded on reset, the upper sector of Flash must be unprotected,
then the Flash Protect/Security byte located as described in
Table 3-1
must be written to.
A protected Flash sector is disabled by the bits FPHDIS and FPLDIS while the size of the protected sector
is defined by FPHS[1:0] and FPLS[1:0] in the FPROT register.
Trying to alter any of the protected areas will result in a protect violation error and bit PVIOL will be set
in the Flash Status Register FSTAT. A mass erase of the whole Flash block is only possible when
protection is fully disabled by setting FPLDIS and FPHDIS bits.
FPOPEN — Opens the Flash for program or erase.
1 = The Flash sectors not protected are enabled for program or erase.
0 = The whole Flash array is protected. In this case the FPHDIS, FPHS[1:0], FPLDIS and
FPLS[1:0] bits within the protection register are don’t care.
FPHDIS — Flash Protection Higher address range Disable.
The FPHDIS bit determines whether there is a protected area in the higher space of the Flash address map.
1 = Protection disabled.
0 = Protection enabled.
FPHS[1:0] — Flash Protection Higher Address Size.
The FPHS[1:0] bits determine the size of the protected sector. Refer to
Table 3-5
.
FPLDIS — Flash Protection Lower address range Disable.
TheFPLDISbitdetermineswhetherthereisaprotectedsectorinthelowerspaceoftheFlashaddressmap.
1 = Protection disabled.
0 = Protection enabled.
FPLS[1:0] — Flash Protection Lower Address Size.
The FPLS[1:0] bits determine the size of the protected sector. Refer to
Table 3-6
.
Table 3-5 Flash Higher Address Range Protection
FPHS
Protected
Address
Range
Protected Size
00
see
Table 3-2
2K bytes
01
4K
10
8K
11
16K
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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