Figure 6.4-15 Verification Flow; Figure 6.4-16 Flash Crc32 Checksum Calculation - Nuvoton ISD94124BYI Technical Reference Manual

Traditional
Programming and (1) Flash ERASE
Verification Flow
I94100
Fast Programming (1) Flash ERASE
Verification Flow
The self-verification feature is available under 32-bit programming and 64-bit programming modes,
but not available in multi-word programming mode (due to the high voltage requirement for flash
programming is not suitable for continuous fast programming).
6.4.4.7 CRC32 Checksum Calculation
The ISD94100 series supports the CRC32 checksum calculation function to help user quickly check
the memory content of APROM, LDROM. The CRC32 polynomial is
32 26
CRC-32: X + X + X
With seed = 0xFFFF_FFFF
The CRC32 checksum calculation flow is shown in Figure 6.4-16.

Figure 6.4-16 Flash CRC32 Checksum Calculation

Sep 9, 2019
ISD94100 Series Technical Reference Manual
(2) Flash PROGRAM
(All datas)
(2) Flash PROGRAM
(All datas)

Figure 6.4-15 Verification Flow

23 22 16 12 11
+ X + X + X + X + X
c[31:0]
CRC32 polynomial
32 26 23 22 16 12
CRC-32: X + X + X + X + X + X
(seed=0xFFFF_FFFF)
crc32[31:0]
crc32[31]
Bit order reverse
crc32[0]
crc_chksum[31]
crc_chksum[31:0]
Page 209 of 928
(3) Flash READ back to check
(All datas)
(3) Read PGFF Flag to check
(FMC_ISPSTS)
10 8 7 5 4
+ X + X + X + X + X
Din[31:0]
Din[0]
Din[31] Din[31]
Bit order reverse
Din[0]
Din[31]
Din[0:31]
d[31:0]
11 10 8 7 5 4 2
+ X + X + X + X + X + X + X + X + 1
crc32[0]
crc32[31]
crc_chksum[0]
END
END
2
+ X + 1
Rev1.09