BR93G46-3B Datasheet, PDF (18/39 Pages) Rohm – Serial EEPROM series Standard EEPROM

BR93G46-3B
Datasheet
●Application
1)Method to cancel each command
○READ
Start bit
Ope code
Address ^*1
1bit
2bit
m+1bit
Cancel is available in all areas in read mode.
・Method to cancel：cancel by CS=low
Figure 41. READ cancel available timing
Data ^*1
x+1bit
*1 For the meaning of m,x, please see tables of command mode in Page15
○WRITE,WRAL
Clock rise of D0 taken
n-1
n
n+1 n+2
SK
DI ^A1
D0
D^a1
b
c
Enlarged figure
Start bit
Ope code
Address ^*1
Data
tE/W
1bit
2bit
m+1bit
x+1bit
a
b
c
a：From start bit to the clock rise of D0 taken
Cancel by CS=low
*1 For the meaning of m,n,x,
please see tables of command mode in Page15
b：The clock rise of D0 taken and after
Cancellation is not available by any means.
c：n+1 clock rise and after
Cancel by CS=low
However, when write is started in b area (CS is ended), cancellation is not
available by any means.
And when SK clock is output continuously cancel function is not available.
Figure 42. WRITE, WRAL cancel available timing
Note 1) If VCC is made OFF in this area, designated address data is not
guaranteed, therefore write once again is suggested.
Note 2)
If CS is started at the same timing as that of the SK rise,
write execution/cancel becomes unstable, therefore, it is
recommended to fall in SK=low area.
As for SK rise, recommend timing of t_CSS/t_CSH or higher.
○ERASE, ERAL
Clock rise of A0 taken
SK
n-1
n
n+1 n+2
DI ^A1
A0
a
b
c
Enlarged figure
Start bit
1bit
Ope code
2bit
Address ^*1
t_E/W
m+1bit
*1 For the meaning of m,n,please see tables of command mode in Page15
a
a：From start bit to clock rise of A0 taken
Cancel by CS=low
b
c
b：Clock rise of A0 taken
Cancellation is not available by any means.
c：n+1 clock rise and after
Cancel by CS=low
However, when write is started in b area (CS is ended), cancellation is not
available by any means.
And when SK clock is output continuously cancel function is not available.
Note 1) If VCC is made OFF in this area, designated address data is not
guaranteed, therefore write once again is suggested.
Note 2)
If CS is started at the same timing as that of the SK rise,
write execution/cancel becomes unstable, therefore, it is
recommended to fall in SK=low area.
As for SK rise, recommend timing of t_CSS/t_CSH or higher.
Figure 43. ERASE, ERAL cancel available timing
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18.FEB.2013 REV.001