M59MR032C120GC6T データシートの表示（PDF） - STMicroelectronics

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M59MR032C120GC6T

32 Mbit (2Mb x16, Mux I/O, Dual Bank, Burst) 1.8V Supply Flash Memory

STMicroelectronics 

M59MR032C, M59MR032D

Bus Invert (BINV). BINV is an input/output signal

used to reduce the amount of power needed to

switch the external address/data bus. The power

saving is achieved by inverting the data output on

ADQ0-ADQ15 every time this gives an advantage

in terms of number of toggling bits. In burst mode

read, each new data output from the memory is

compared with the previous data. If the number of

transitions required on the data bus is in excess of

8, the data is inverted and the BINV signal will be

driven by the memory at VOH to inform the receiv-

ing system that data must be inverted before any

further processing. By doing so, the actual transi-

tions on the data bus will be less than 8. In a simi-

lar way, when a command is given, BINV may be

driven by the system at VIH to inform the memory

that the data must be inverted.Like the other input/

output pins, BINV is high impedance when the

chip is deselected, output enable G is at VIH or RP

is at VIL; when used as an input, BINV must follow

the same setup and hold timings of the data in-

puts.

VDD and VDDQ Supply Voltage (1.65V to 2.0V).

The main power supply for all operations (Read,

Program and Erase). VDD and VDDQ must be at

the same voltage.

VPP Program Supply Voltage (12V). VPP is

both a control input and a power supply pin. The

two functions are selected by the voltage range

applied to the pin; if VPP is kept in a low voltage

range (0 to 2V) VPP is seen as a control input, and

the current absorption is limited to 5µA (0.2µA typ-

ical). In this case with VPP = VIL we obtain an ab-

solute protection against program or erase; with

VPP = VPP1 these functions are enabled. VPP val-

ue is only sampled during program or erase write

cycles; a change in its value after the operation

has been started does not have any effect and

program or erase are carried on regularly. If VPP is

used in the 11.4V to 12.6V range (VPP2) then the

pin acts as a power supply. This supply voltage

must remain stable as long as program or erase

are finished. In read mode the current sunk is less

then 0.5mA, while during program and erase oper-

ations the current may increase up to 10mA.

VSS Ground. VSS is the reference for all the volt-

age measurements.

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