JS28F640J3D-75 datasheet(61/68 Pages) NUMONYX

61 / 68 page

November 2007

Datasheet

308551-05

Numonyx™ Embedded Flash Memory (J3 v. D)

13.5

System Interface Information

The following device information can optimize system interface software.

13.6

Device Geometry Definition

This field provides critical details of the flash device geometry.

Table 37: System Interface Information

Offset

Length

Description

Add.

Hex

Code

Value

1Bh

VCC logic supply minimum program/erase voltage

bits 0–3 BCD 100 mV

bits 4–7 BCD volts

1B:

--27

2.7 V

1Ch

VCC logic supply maximum program/erase voltage

bits 0–3 BCD 100 mV

bits 4–7 BCD volts

1C:

--36

3.6 V

1Dh

VPP [programming] supply minimum program/erase voltage

bits 0–3 BCD 100 mV

bits 4–7 HEX volts

1D:

--00

0.0 V

1Eh

VPP [programming] supply maximum program/erase voltage

bits 0–3 BCD 100 mV

bits 4–7 HEX volts

1E:

--00

0.0 V

1Fh

“n” such that typical single word program time-out = 2n µs

1F:

--06

64 µs

20h

“n” such that typical max. buffer write time-out = 2n µs

20:

--07

128 µs

21h

“n” such that typical block erase time-out = 2n ms

21:

--0A

1 s

22h

“n” such that typical full chip erase time-out = 2n ms

22:

--00

23h

“n” such that maximum word program time-out = 2n times typical

23:

--02

256 µs

24h

“n” such that maximum buffer write time-out = 2n times typical

24:

--03

1024 µs

25h

“n” such that maximum block erase time-out = 2n times typical

25:

--02

4 s

26h

“n” such that maximum chip erase time-out = 2n times typical

26:

--00

Table 38: Device Geometry Definition

Offset

Length

Description

Code See Table Below

27h

“n” such that device size = 2n in number of bytes

27:

28h

Flash device interface: x8 async x16 async x8/x16 async

28:

--02

x8/

x16

28:00,29:00 28:01,29:00 28:02,29:00

29:

--00

2Ah

“n” such that maximum number of bytes in write buffer = 2n

2A:

--05

2B:

--00

2Ch

Number of erase block regions within device:

1. x = 0 means no erase blocking; the device erases in “bulk”

2. x specifies the number of device or partition regions with one or more

contiguous same-size erase blocks

3. Symmetrically blocked partitions have one blocking region

4. Partition size = (total blocks) x (individual block size)

2C:

--01

2Dh

Erase Block Region 1 Information

2D:

bits 0–15 = y, y+1 = number of identical-size erase blocks

2E:

bits 16–31 = z, region erase block(s) size are z x 256 bytes

2F:

30:

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