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S71WS-P based MCP Products

S71WS-P_00_A2 August 21, 2006

Da ta

Sh eet

( A dv an ce

In f o r m at io n)

3.3

NOR Flash and pSRAM Input/Output Descriptions

Amax-A0

=

NOR Flash Address inputs

DQ15-DQ0

=

Flash Data input/output, shared between NOR and ORNAND Flash. DQ0-DQ7 shared for x8 ORNAND

F-CE#

=

NOR Flash Chip-enable input #1. Asynchronous relative to CLK for Burst Mode.

OE#

=

Output Enable input. Asynchronous relative to CLK for Burst mode.

WE#

=

Write Enable input.

=

NOR Flash device power supply (1.7 V - 1.95V).

=

Input/Output Buffer power supply.

=Ground

RFU

=

Reserved for Future Use

RDY

=

Flash ready output. Indicates the status of the Burst read. VOL = data valid. The Flash RDY pin is shared

with the WAIT pin of the pSRAM.

CLK

=

NOR Flash Clock, shared with CLK of burst-mode pSRAM.. The first rising edge of CLK in conjunction

with AVD# low latches the address input and activates burst mode operation. After the initial word is

output, subsequent rising edges of CLK increment the internal address counter. CLK should remain low

during asynchronous access.

AVD#

=

NOR Flash Address Valid input. Shared with AVD# of burst-mode pSRAM. Indicates to device that the

valid address is present on the address inputs.

VIL = for asynchronous mode, indicates valid address; for burst mode, causes starting address to be

latched on rising edge of CLK.

VIH= device ignores address inputs

F-RST#

=

NOR Flash hardware reset input. VIL= device resets and returns to reading array data

F-WP#

=

NOR Flash hardware write protect input. VIL = disables program and erase functions in the four

outermost sectors.

F-ACC

=

NOR Flash accelerated input. At VHH, accelerates programming; automatically places device in unlock

bypass mode. At VIL, disables all program and erase functions. Should be at VIH for all other conditions.

R-CE#

=

Chip-enable input for pSRAM

R-CRE

=

Control Register Enable (pSRAM). For CellularRAM only.

R-VCC

=

pSRAM Power Supply

R-UB#

=

Upper Byte Control (pSRAM)

R-LB#

=

Lower Byte Control (pSRAM)

DNU

=

Do Not Use