CFI v1.4 VendorSpec Ext AN

AN201168
Common Flash Interface Version 1.4 Vendor Specific Extensions
AN201168 provides an overview of the changes implemented between versions 1.3 and 1.4 of the Cypress Flash memory
Common Flash Interface (CFI) implementation.
1
Introduction
This application note provides an overview of the changes implemented between versions 1.3 and 1.4 of the
Cypress® Flash memory Common Flash Interface (CFI) implementation.
CFI is a JEDEC standard database that may be read from a Flash memory. It allows Flash driver software to
query the installed device to determine the proper configuration, e.g. memory size, speed, special features, and
other characteristics.
The JEDEC CFI standard provides for vendor specific extensions to the basic device information. These
extensions provide information about optional device features. As successive device generations add new
features new fields are added to the vendor specific extensions area.
2
Benefit
There are two main benefits of using CFI:

Ease of upgrading memory density or features

Second source availability
CFI-compliant Flash allows the system designer to add and upgrade memory without the inconvenience of
modifying Flash driver software to adapt to each new device in a product family. This holds true for new devices of
higher density or different sector architecture than available at the time of initial system and driver development.
3
CFI Data Structure
From the CFI mode the user can access the following information (Note, the subsequent CFI data tables are
provided as examples only. For product-specific CFI data, refer to the Cypress data sheet):

CFI Identification String - A standard string of characters that any CFI compliant device will display so that
Flash driver software can confirm that a CFI device is in use. See Table 1

System Interface String - Information on device voltage and timing parameter. See Table 2.

Device Geometry Definition - Information on command protocol, device size, and sector sizes. See Table 3.

Primary Vendor-Specific Extended Query - Information on vendor or device specific features that are
supported. See Table 4.
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Document No. 002-01168 Rev. *A
1
Common Flash Interface Version 1.4 Vendor Specific Extensions
Table 1. CFI Query Identification String
Addresses (x16)
Data
10h
11h
12h
0051h
0052h
0059h
Description
Query Unique ASCII String “QRY”
13h
14h
0002h
0000h
Primary OEM Command Set
15h
16h
0040h
0000h
Address for Primary Extended Table
17h
18h
0000h
0000h
Alternate OEM Command Set (00h = none exists)
19h
1Ah
0000h
0000h
Address for Alternate OEM Extended Table (00h = none exists)
Table 2. System Interface String
Addresses (x16)
Data
Description
1Bh
0027h
VCC Min. (Write/Erase)
D7-D4: volt, D3-D0: mV
1Ch
0036h
VCC Max. (Write/Erase)
D7-D4: volt, D3-D0: mV
1Dh
0000h
VPP Min. voltage (00h = no VPP pin present)
1Eh
0000h
VPP Max. voltage (00h = no VPP pin present)
1Fh
0007h
Typical timeout per single byte/word 2N µs
20h
0007h
Typical timeout for Min. size buffer write 2N µs (00h = not supported)
21h
0000h
Typical timeout per individual block erase 2N ms
22h
0000h
Typical timeout for full chip erase 2N ms (00h = not supported)
23h
0001h
Max. timeout for byte/word write 2N times typical
24h
0005h
Max. timeout for buffer write 2N times typical
25h
0004h
Max. timeout per individual block erase 2N times typical
26h
0000h
Max. timeout for full chip erase 2N times typical (00h = not supported)
Table 3. CFI Device Geometry Definition (Sheet 1 of 2)
Addresses (x16)
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Data
Description
N
27h
0018h
Device size = 2 byte
28h
29h
0002h
0000h
Flash device interface description (refer to CFI publication 100)
2Ah
2Bh
0005h
0000h
Max. number of bye in multi-byte write = 2N (00h = not supported)
2Ch
0001h
Number of erase block regions within device
(01h = uniform device, 02h = boot device)
2Dh
2Eh
2Fh
30h
00FFh
0000h
0000h
0001h
Erase block region 1 information
(refer to the CFI specification or CFI publication 100)
31h
32h
33h
34h
0000h
0000h
0000h
0000h
Erase block region 2 information
(refer to CFI publication 100)
Document No. 002-01168 Rev. *A
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Common Flash Interface Version 1.4 Vendor Specific Extensions
Table 3. CFI Device Geometry Definition (Sheet 2 of 2)
Addresses (x16)
Data
35h
36h
37h
38h
0000h
0000h
0000h
0000h
Description
Erase block region 3 information
(refer to CFI publication 100)
39h
3Ah
3Bh
3Ch
0000h
0000h
0000h
0000h
Erase block region 4 information
(refer to CFI publication 100)
Table 4. Primary Vendor-Specific Extended Query
4
Addresses (x16)
Data
40h
41h
42h
0050h
0052h
0049h
Description
Query-unique ASCII string “PRI”
43h
0031h
Major version number, ASCII
44h
0033h
Minor version number, ASCII
45h
0004h
Address Sensitive Unlock (Bits 1-0)
0 = Required, 1 = Not Required
Silicon Technology (bits 5-2) 0001 = 0.17 µm
46h
0002h
Erase Suspend
0 = Not Supported, 1 = To Read Only, 2 = To Read & Write
47h
0001h
Sector Protect
00 = Not Supported, x = Number of sectors per group
48h
0000h
Sector Temporary Unprotect
00 = Not Supported, 01 = Supported
49h
0005h
Sector Protect / Unprotect scheme
04 = 29LV800 mode
4Ah
0063h
Simultaneous Operation
Number of sectors in all banks except boot block
4Bh
0001h
Burst Mode Type
00 = Not Supported, 01 = Supported
4Ch
0000h
Page Mode Type
00 = Not Supported, 01 = 4 Word Page, 02 = 8 Word Page
4Dh
0085h
ACC (Acceleration) Supply Minimum
00h = Not Supported, D7-D4: Volt, D3-D0: 100mV
4Eh
00C5h
ACC (Acceleration) Supply Maximum
00h = Not Supported, D7-D4: Volt, D3-D0: 100mV
4Fh
00xxh
Top/Bottom Boot Sector Flag
02h = Bottom Boot Device, 03h = Top Boot Device
50h
0000h
Program Suspend. 00h = not supported
57h
0004h
Bank Organization: x = Number of Banks
58h
0023h
Bank A Region Information. x = Number of sectors in bank
59h
0020h
Bank B Region Information. x = Number of sectors in bank
5Ah
0020h
Bank C Region Information. x = Number of sectors in bank
5Bh
0023h
Bank D Region Information. x = Number of sectors in bank
Changes
The major difference between Cypress memory specific CFI extensions version 1.3 and version 1.4 are the
addition of these features in the Primary Vendor-Specific Extended Query section:

Unlock Bypass

Secured Silicon Sector size

Hardware Reset Low Time-out during an embedded algorithm

Hardware Reset Low Time-out not during an embedded algorithm
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Document No. 002-01168 Rev. *A
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Common Flash Interface Version 1.4 Vendor Specific Extensions

Erase Suspend Time-out Maximum

Program Suspend Time-out Maximum

Increased Bank region information from four bank to thirty-two bank
These changes will be implemented in new Cypress Flash devices. The added features are highlighted in Table 5.
New Features are highlighted in bold face type.
Table 5. Updated Primary Vendor-Specific Extended Query (Sheet 1 of 3)
Address (byte mode)
Data
40h
41h
42h
50h
52h
49h
query-unique ASCII string “PRI”
43h
31h
Major version number ASCII
44h
34h
Minor version ASCII
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Description
45h
Address Sensitive Unlock (DQ1,DQ0)
0000 (Hex) = required, 0001 (Hex) = NOT Required
Process Technology (DQ5-DQ2)
0001 (Hex) = 170 nm Floating Gate
technology
®
0010 (Hex) = 230 nm MirrorBit technology
0011 (Hex) = 130 nm Floating Gate technology
®
0100 = 110 nm MirrorBit® technology
0101 = 90 nm MirrorBit technology
0110 = 90 nm Floating Gate technology
0111 = 65 nm MirrorBit Eclipse
1000 = 65 nm MirrorBit
1001 = 45 nm MirrorBit
46h
Erase Suspend
00 = Not Supported, 01 = To read only, 02 = To read and write
47h
Sector Protect
00 = Not Supported, X = Number of sectors per group
48h
Sector Temporary Unprotect
00 = Not Supported, 01 = Supported
49h
Sector Protect/Unprotect scheme
01 = 29F040 mode
02 = 29F016 mode
03 = 29F400 mode
04 = 29LV800 mode -> RESET# or A9 =Vid
05 = Software command sector locking
06 = New Sector Protect
07 = RESET# or A9 =Vid + New Sector Protect
08 = Advanced Sector Protect
4Ah
Simultaneous Operation
00 = Not Supported, X = Total number of sectors in all banks except BOOT BANK
4Bh
Burst Mode Type
00 = Not Supported, 01=Supported
4Ch
Page Mode Type
00 = Not Supported, 01 = 4 word Page, 02 = 8 word Page, 03 = 16 word Page
4Dh
ACC (Acceleration) Supply Minimum
Bit 7-4 = Hex Value in Volts
Bit 3-0 = BCD Value in 100 Millivolts
4Eh
ACC (Acceleration) Supply Maximum
Bit 7-4 = Hex Value in Volts
Bit 3-0 = BCD Value in 100 Millivolts
4Fh
Top/Bottom Sector Flag
00 = No Boot
01 = 8x8kb, Sectors at TOP and Bottom
02 = Bottom Boot Device
03 = Top Boot Device
04 = Uniform Bottom Boot Device
05 = Uniform Top Boot Device
50h
Program Suspend
00 = Not Supported, 01=Supported
51h
Unlock Bypass
00 = Not Supported, 01 = Supported
52h
Secured Silicon Sector (Customer OTP Area) Size 2N (Bytes)
Document No. 002-01168 Rev. *A
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Common Flash Interface Version 1.4 Vendor Specific Extensions
Table 5. Updated Primary Vendor-Specific Extended Query (Sheet 2 of 3)
Address (byte mode)
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Data
Description
53h
Software Features
bit 0: status register polling (1=supported, 0=not supported),
bit 1: DQ polling (1=supported, 0=not supported),
bit 2: new program suspend/resume commands (1=supported, 0=not
supported)
bit 3: word programming (1=supported, 0=not supported),
bit 4: bit-field programming (1=supported, 0=not supported),
bit 5: autodetect programming (1=supported, 0=not supported),
bit 6: Refresh/Recovery command (not in data sheet) (1=supported, 0=not
supported),
bit 7: multiple writes per Line. (1=supported, 0=not supported)
54h
Page Size = 2N bytes
55h
Erase Suspend Timeout Maximum < 2N (us)
56h
Program Suspend Timeout Maximum < 2N (us)
57h
Bank Organization
00 = If data at 4Ah is Zero
XX = Number of banks
58h
Bank1 Region Information
= Number of sectors in Bank 1
59h
Bank2 Region Information
= Number of sectors in Bank 2
5Ah
Bank3 Region Information
= Number of sectors in Bank 3
5Bh
Bank4 Region Information
= Number of sectors in Bank 4
5Ch
Bank5 Region Information
= Number of sectors in Bank 5
5Dh
Bank6 Region Information
= Number of sectors in Bank 6
5Eh
Bank7 Region Information
= Number of sectors in Bank 7
5Fh
Bank8 Region Information
= Number of sectors in Bank 8
60h
Bank9 Region Information
= Number of sectors in Bank 9
61h
Bank10 Region Information
= Number of sectors in Bank 10
62h
Bank11 Region Information
= Number of sectors in Bank 11
63h
Bank12 Region Information
= Number of sectors in Bank 12
64h
Bank13 Region Information
= Number of sectors in Bank 13
65h
Bank14 Region Information
= Number of sectors in Bank 14
66h
Bank15 Region Information
= Number of sectors in Bank 15
67h
Bank16 Region Information
= Number of sectors in Bank 16
68h
Bank17 Region Information
= Number of sectors in Bank 17
69h
Bank18 Region Information
= Number of sectors in Bank 18
6Ah
Bank19 Region Information
= Number of sectors in Bank 19
6Bh
Bank20 Region Information
= Number of sectors in Bank 20
6Ch
Bank21 Region Information
= Number of sectors in Bank 21
Document No. 002-01168 Rev. *A
5
Common Flash Interface Version 1.4 Vendor Specific Extensions
Table 5. Updated Primary Vendor-Specific Extended Query (Sheet 3 of 3)
Address (byte mode)
5
Data
Description
6Dh
Bank22 Region Information
= Number of sectors in Bank 22
6Eh
Bank23 Region Information
= Number of sectors in Bank 23
6Fh
Bank24 Region Information
= Number of sectors in Bank 24
70h
Bank25 Region Information
= Number of sectors in Bank 25
71h
Bank26 Region Information
= Number of sectors in Bank 26
72h
Bank27 Region Information
= Number of sectors in Bank 27
73h
Bank28 Region Information
= Number of sectors in Bank 28
74h
Bank29 Region Information
= Number of sectors in Bank 29
75h
Bank30 Region Information
= Number of sectors in Bank 30
76h
Bank31 Region Information
= Number of sectors in Bank 31
77h
Bank32 Region Information
= Number of sectors in Bank 32
78h
Embedded Hardware Reset Timeout Maximum < 2N (µs)
Reset with Reset Pin
79h
Non-Embedded Hardware Reset Timeout Maximum < 2N (µs)
Power on Reset
Conclusion
These changes enable updated Flash driver software to recognize and make use of new device features.
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Document No. 002-01168 Rev. *A
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Common Flash Interface Version 1.4 Vendor Specific Extensions
Document History Page
Document Title: AN201168 - Common Flash Interface Version 1.4 Vendor Specific Extensions
Document Number: 002-01168
Rev.
ECN No.
Orig. of
Change
Submission
Date
**
–
–
03/22/2004 10/21/2009
*A
5015948
MSWI
11/16/2015
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Description of Change
Initial version
Corrected table: Updated Primary Vendor-Specific Extended Query, Address 45h
Changed to new format
Updated table: Updated Primary Vendor-Specific Extended Query
Updated table: Updated Primary Vendor-Specific Extended Query, Address 45h
Updated in Cypress template
Document No. 002-01168 Rev. *A
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Common Flash Interface Version 1.4 Vendor Specific Extensions
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