GE28F320C3BD70 Intel, GE28F320C3BD70 Datasheet - Page 62

• Manufacturer Part Number: GE28F320C3BD70
• Manufacturer: Intel

Specifications of GE28F320C3BD70

• Density: 32Mb
• Access Time (max): 70ns
• Interface Type: Parallel
• Boot Type: Bottom
• Address Bus: 21b
• Operating Supply Voltage (typ): 3/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: VFBGA
• Sync/async: Asynchronous
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.7V
• Operating Supply Voltage (max): 3.6V
• Word Size: 16b
• Number Of Words: 2M
• Supply Current: 18mA
• Mounting: Surface Mount
• Pin Count: 48
• Lead Free Status / Rohs Status: Not Compliant

Appendix C Common Flash Interface
C.1
Table 28: Summary of Query Structure Output as a Function of Device and Mode
Datasheet
62
This appendix defines the data structure or “database” returned by the Common Flash
Interface (CFI) Query command. System software should parse this structure to gain
critical information such as block size, density, x8/x16, and electrical specifications.
Once this information has been obtained, the software detects which command sets to
use to enable flash writes, block erases, and otherwise control the flash component.
The Query is part of an overall specification for multiple command set and control
interface descriptions called Common Flash Interface, or CFI.
Query Structure Output
The Query database allows system software to obtain information for controlling the
flash device. This section describes the device’s CFI-compliant interface that allows
access to Query data.
Query data are presented on the lowest-order data outputs (DQ0-DQ7) only. The
numerical offset value is the address relative to the maximum bus width supported by
the device. On this family of devices, the Query table device starting address is a 0x10,
which is a word address for x16 devices.
For a word-wide (x16) device, the first two Query-structure bytes, ASCII “Q” and “R,”
appear on the low byte at word addresses 0x10 and 0x11. This CFI-compliant device
outputs 0x00 data on upper bytes. The device outputs ASCII “Q” in the low byte (DQ0-
DQ7) and 0x00 in the high byte (DQ8-DQ15).
At Query addresses containing two or more bytes of information, the least-significant
data byte is presented at the lower address, and the most-significant data byte is
presented at the higher address.
For tables in this appendix, addresses and data are represented in hexadecimal
notation, so the “h” suffix has been dropped. In addition, since the upper byte of word-
wide devices is always “0x00,” the leading “00” has been dropped from the table
notation and only the lower byte value is shown. Any x16 device outputs can be
assumed to have 0x00 on the upper byte in this mode.
Device Addresses
Device
Hex Offset
00010:
00011:
00012:
Hex Code
51
52
59
ASCII Value
"Q"
"R"
"Y"
C3 Discrete
March 2008
290645-24