JS28F320J3F75 datasheet(64/67 Pages) NUMONYX

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Datasheet

Numonyx® Embedded Flash Memory (J3 65 nm) Single Bit per Cell (SBC)

Table 44: Protection Register Information

Offset(1)

P = 31h

Length

Description

(Optional Flash Features and Commands)

Add.

Hex

Code

Value

(P+E)h

Number of Protection register fields in JEDEC ID space.

“00h,” indicates that 256 protection bytes are available

3F:

--01

(P+F)h

(P+10)h

(P+11)h

(P+12)h

Protection Field 1: Protection Description

This field describes user-available One Time Programmable (OTP)

protection register bytes. Some are pre-programmed with device-

unique serial numbers. Others are user-programmable. Bits 0-15 point

to the protection register lock byte, the section’s first byte. The

following bytes are factory pre-programmed and user-programmable.

bits 0-7 = Lock/bytes JEDEC-plane physical low address

bits 8-15 = Lock/bytes JEDEC-plane physical high address

bits 16-23 = “n” such that 2n = factory pre-programmed bytes

bits 24-31 = “n” such that 2n = user-programmable bytes

40:

41:

42:

43:

--80

--00

--03

80h

00h

8bytes

Note:

The variable P is a pointer which is defined at CFI offset 15h.

Table 45: Burst Read Information

Offset(1)

P = 31h

Length

Description

(Optional Flash Features and Commands)

Add.

Hex

Code

Value

(P+13)h

Page Mode Read capability

bits 0–7 = “n” such that 2n HEX value represents the number of read-

page bytes. See offset 28h for device word width to determine page-

mode data output width. 00h indicates no read page buffer.

44:

--04

16 byte

(P+14)h

Number of synchronous mode read configuration fields that follow. 00h

indicates no burst capability.

45:

--00

(P+15)h

Synchronous Mode Read Capability Configuration 1

Bits 3-7 = Reserved

bits 0-2 = “n” such that 2n+1 HEX value represents the maximum

number of continuous synchronous burst reads when the device is

configured for its maximum word width. A value of 07h indicates that

the device is capable of continuous linear bursts until that will output

data until the internal burst counter reaches the end of the device’s

burstable address space. This field’s 3-bit value can be written directly

to the Read Configuration Register Bits 0-2 if the device is configured for

its maximum word width. See offset 1Fh for word width to determine

the burst data output width.

46:

--00

n/a

(P+16h)h

Synchronous Mode Read Capability Configuration 2

47:

--00

n/a

(P+45h)h

J3C mark for VIL fix for customers

76:

--01

Note:

The variable P is a pointer which is defined at CFI offset 15h.

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