S2100 Ver la hoja de datos (PDF) - Seiko Instruments Inc

Número de pieza

componentes Descripción

Fabricante

S2100

64-bit FUSE ROM

Seiko Instruments Inc 

64-bit FUSE ROM

S-2100R

n Program Mode Operation

By setting the CE/PE terminal to “H” level, the S-2100R enters the counter hold mode and at the same time enters the program

mode. *5

Writing is done in program mode after selecting the address in read mode. *6 Select the address, and supply “H” level to the

CE/PE terminal and “L” level to the DATA terminal, with the writing pulse VPP being supplied to the PD/VPP terminal. “L” level can

be written into the selected address only once. *7 *8

If you coutinue writing from address 1 to 64, the output of the COUNTER OUT terminal goes to “H” level, just like in the read mode,

and no more CLK pulses or writing pulses in program mode can be accepted.

CE/P

RS

CL

DATA

PD/VPP

tCDS

tCDH

Address 1

output

Data input

tDS

tDH

Address 1

output

Address 2

output

tPW

Figure 5 Program mode timing

Data input

*5 In program mode, operate at VDD=5.0 V to assure reliability of the data writing.

*6 The selection of addresses is possible only in read mode. Address 1 is selected by RST pulses and writing proceeds

sequentially from address 1 by CLK pulse.

*7 All the memories are initially at “H” level, so writing into “L” can be done. When data is at “H” level, writing voltage cannot

be supplied to the memory.

*8 Address 1 is selected again by the RST pulse. The addresses which are not written to “L” level are at “H” level, so writing

“L” level in these addresses is possible.

Seiko Instruments Inc.

5

Share Link: