HM25Q40C datasheet(19/62 Pages) HMSEMI

19 / 62 page

Preliminary Datasheet

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

SFDP

Parameter

Relative Byte

Address

SFDP

Dword

Name

Data

Description

68h

JEDEC

Basic

Flash

Parameter

Dword-16

E8h

Bits 31:24 = Enter 4-Byte Addressing

= xxxx_xxx1b:issue instruction B7 (preceding write enable not required

+ xx1x_xxxxb: Supports dedicated 4-byte address instruction set. Consult vendor

data sheet

for the instruction set definition or look for 4-byte Address Parameter Table.

+ 1xxx_xxxxb: Reserved

= 10000000b not supported

Bits 23:14 = Exit 4-byte Addressing

= xx_xxxx_xxx1b:issue instruction E9h to exit 4-byte address mode (Write enable

instruction

06h is not required)

+ xx_xx1x_xxxxb: Hardware reset

+ xx_x1xx_xxxxb: Software reset (see bits 13:8 in this DWORD)

+ xx_1xxx_xxxxb: Power cycle

+ x1_xxxx_xxxxb: Reserved

+ 1x_xxxx_xxxxb: Reserved

= 11_0000_0000b not supported

Bits 13:8 = Soft Reset and Rescue Sequence Support

= x1_xxxxb: issue reset enable instruction 66h, then issue reset instruction 99h.

The reset enable, reset sequence may be issued on 1,2, or 4 wires depending on

the device operating mode

+ 1x_xxxxb: exit 0-4-4 mode is required prior to other reset sequences above if the

device may be operating in this mode.

= 11_0000b

Bit 7 = RFU = 1

Bits 6:0 = Volatile or Non-Volatile Register and Write Enable Instruction for Status

= xxx_1xxxb: Non-Volatile/Volatile status register 1 powers-up to last written value

in the nonvolatile status register, use instruction 06h to enable write to non-volatile

status register. Volatile status register may be activated after power-up to override

the non-volatile status register, use instruction 50h to enable write and activate the

volatile status register.

+ x1x_xxxxb: Reserved

+ 1xx_xxxxb: Reserved

= 1101000b

Binary Fields: 10000000-1100000000-110000-1-1101000

Nibble Format: 1000_0000_1100_0000_0011_0000_1110_1000

Hex Format: 80_C0_30_E8

69h

30h

6Ah

C0h

6Bh

80h

HM25Q40A

HM25Q40C Scheda tecnica(PDF) 19 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

HM25Q40C Scheda tecnica(HTML) 19 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62

Scheda tecnica Scarica

Link URL