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PF28F1602C3TD70

Intel® Advanced+ Boot Block Flash Memory (C3)

Intel 

C3 SCSP Flash Memory

4.0

Power and Reset Considerations

4.1

4.2

4.2.1

4.2.2

Power-Up/Down Characteristics

In order to prevent any condition that may result in a spurious write or erase operation, it is

recommended to power-up F-VCC, F-VCCQ and S-VCC together. Conversely, F-VCC, F-VCCQ and

S-VCC must power-down together. It is also recommended to power-up F-VPP with or slightly after

F-VCC. Conversely, F-VPP must power down with or slightly before F-VCC.

If F-VCCQ and/or F-VPP are not connected to the F-VCC supply, then F-VCC should attain F-

VCCMin before applying F-VCCQ and F-VPP. Device inputs should not be driven before supply

voltage = F-VCCMin. Power supply transitions should only occur when F-RP# is low.

Additional Flash Features

C3 SCSP products provide in-system programming and erase in the 1.65 V–3.3 V range. For fast

production programming, it also includes a low-cost, backward-compatible 12 V programming

feature.

Improved 12 Volt Production Programming

When F-VPP is between 1.65 V and 3.3 V, all program and erase current is drawn through the

F-VCC signal. Note that if F-VPP is driven by a logic signal, VIH min = 1.65 V. That is, F-VPP must

remain above 1.65 V to perform in-system flash modifications. When F-VPP is connected to a 12 V

power supply, the device draws program and erase current directly from the F-VPP signal. This

eliminates the need for an external switching transistor to control the voltage F-VPP. Figure 12

“Example Power Supply Configurations” on page 43 shows examples of how the flash power

supplies can be configured for various usage models.

The 12 V F-VPP mode enhances programming performance during the short period of time

typically found in manufacturing processes; however, it is not intended for extended use. 12 V may

be applied to F-VPP during program and erase operations for a maximum of 1000 cycles on the

main blocks and 2500 cycles on the parameter blocks. F-VPP may be connected to 12 V for a total

of 80 hours maximum. Stressing the device beyond these limits may cause permanent damage.

F-VPP ≤ VPPLK for Complete Protection

In addition to the flexible block locking, the F-VPP programming voltage can be held low for

absolute hardware write protection of all blocks in the flash device. When F-VPP is below VPPLK,

any program or erase operation will result in a error, prompting the corresponding status register bit

(SR.3) to be set.

Datasheet

Intel® Advanced+ Boot Block Flash Memory (C3) SCSP Family

Order Number: 252636, Revision: 004

26 Aug 2005

25

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