T25S16AFEPR datasheet(16/74 Pages) HMSEMI

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Table 5.4 Basic SPI Flash Parameter, JEDEC SFDP Rev B (Sheet 2 of 5)

SFDP

Parameter

Relative

Byte

Address

SFDP Dword

Name

Data

Description

48h

JEDEC

Basic Flash

Parameter

Dword-7

FFh

Bits 7:0 = RFU = FFh

49h

FFh

Bits 15:8 = RFU = FFh

4Ah

FFh

Bits 23:21 = number of QPI Mode cycles = 010b

Bits 20:16 = number of QPI Dummy cycles = 00010b for default latency code

4Bh

EBh

QPI instruction code

4Ch

JEDEC

Basic Flash

Parameter

Dword-8

0Ch

Erase Type 1 size 2N Bytes = 4 kB = 0Ch (for Uniform 4 kB)

4Dh

20h

Erase Type 1 instruction

4Eh

0Fh

Erase Type 2 size 2N Bytes = 32 kB = 0Fh (for Uniform 32 kB)

4Fh

52h

Erase Type 2 instruction

50h

JEDEC

Basic Flash

Parameter

Dword-9

10h

Erase Type 3 size 2N Bytes =64 kB = 10h(for Uniform 64 kB)

51h

D8h

Erase Type 3 instruction

52h

00h

Erase Type 4 size 2N Bytes = not supported = 00h

53h

FFh

Erase Type 4 instruction = not supported = FFh

54h

JEDEC

Basic Flash

Parameter

Dword-4

13h

Bits 31:30 = Erase Type 4 Erase, Typical time units (00b: 1 ms, 01b: 16 ms,

10b: 128 ms, 11b:1 s) = RFU = 11b

Bits 29:25 = Erase Type 4 Erase, Typical time count = RFU = 11111b (typ erase

time = (count+1) * units) = RFU =11111

Bits 24:23 = Erase Type 3 Erase, Typical time units (00b: 1 ms, 01b: 16 ms,

10b: 128 ms, 11b:1 s) = RFU = 01b

Bits 22:18 = Erase Type 3 Erase, Typical time count = 01111b (typ erase time =

(count +1) *units) = 16*16 ms =250ms

Bits 17:16 = Erase Type 2 Erase, Typical time units (00b: 1 ms, 01b: 16 ms,

10b: 128 ms, 11b:1 s) = 16 ms = 01b

Bits 15:11 = Erase Type 2 Erase, Typical time count = 01011b (typ erase time =

(count +1) *units) = 12*16 ms = 180 ms

Bits 10:9 = Erase Type 1 Erase, Typical time units (00b: 1 ms, 01b: 16 ms, 10b:

128 ms, 11b: 1s) = 16ms = 01b

Bits 8:4 = Erase Type 1 Erase, Typical time count = 00001b (typ erase time =

(count +1) *units) = 2*16 ms = 35 ms

Bits 3:0 = Count = (Max Erase time / (2 * Typical Erase time))- 1 = 0011b

Multiplier from typical erase time to maximum erase time = 8x multiplier

Max Erase time = 2*(Count +1)*Typ Erase time

Binary Fields: 1111111_0101111_0101011_0100001_0011

Nibble Format: 1111_1110_1011_1101_0101_1010_0001_0011

Hex Format: FE_BD_5A_13

55h

5Ah

56h

BDh

57h

FEh

HM25Q128A

T25S16AFEPR Datenblatt(PDF) 16 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

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