S2100R Ver la hoja de datos (PDF) - Seiko Instruments Inc

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componentes Descripción

Fabricante

S2100R

64-bit FUSE ROM

Seiko Instruments Inc 

64-bit FUSE ROM

S-2100R

n Input Priority

In read mode, priority is given to either the CLK or RST terminal, whichever is entered first. Whichever pulse is input earlier is

recognized to be valid from the rising till the end of the operation. If the pulse input later is at “L” level, the signal is ignored, even

though the effective pulse input earlier rises. *9

If the CLK and RST pulses are input, the mode shifts from read mode to counter hold mode when both the CLK and the RST

terminals go to “H” level. *10

If the CLK and RST pulses which are input in the counter hold mode are still at “L” level after setting the CE/PE terminal to “L” level,

these CLK and RST terminals are ignored. The mode shifts to read mode and data which is held before the shift is output at the

DATA terminal. *11

In program mode, inputting the DATA terminal before the CE/PE terminal goes to “H” level is prohibited. Also, charging the

writing voltage from the PD/VPP terminal is prohibited when the CE/PE terminal is at “L” level. In program mode, input to the DATA

terminal muse be decided before charging the writing voltage. *12

*9 Input of the CLK and RST pulses is not recognized as valid unless both pulses are input at “H” level.

*10 The counter hold mode is entered when reading of the CLK and RST pulses has been finished and DATA output has been

stabilized .

*11 No more CLK or RST pulses are accepted unless both the CLK and RST terminals are at “H” level.

*12 If data input is changed while writing voltage is supplied, the S-2100R does not accept the changed data.

n Notes

Memory should not be accessed for at least 10 ms after voltage is supplied and goes to VDD.

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Seiko Instruments Inc.

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