br93lc66 ROHM Co. Ltd., br93lc66 Datasheet - Page 4

• Manufacturer Part Number: br93lc66
• Description: 4,096-bit Serial Electrically Erasable Prom
• Manufacturer: ROHM Co. Ltd.

•
(1) Command mode
With these ICs, commands are not
recognized or acted upon until the
start bit is received. The start bit is
taken as the first “1” that is received
after the CS pin rises.
and input of the SK clock, data corre-
sponding to the specified address is
output, with data corresponding to up-
per addresses then output in se-
quence. (Auto increment function)
es command is executed, all data in the selected memory cell is erased automatically, and the input data is written to
the cell.
(2) Operation timing characteristics
(unless otherwise noted, Ta = – 40 to 85°C, V
4
SK clock frequency
SK "H" time
SK "L" time
CS "L" time
CS setup time
DI setup time
CS hold time
DI hold time
Data "1" output delay time
Data "0" output delay time
Time from CS to output confirmation
Time from CS to output High impedance
Write cycle time
1 After setting of the read command
2 When the write or write all address-
3 These modes are optional modes. Please contact Rohm for information on operation timing.
Memory ICs
Circuit operation
Parameter
BR93LC66 / BR93LC66F / BR93LC66RF / BR93LC66FV
Symbol
t
t
t
t
t
t
t
t
t
t
E / W
f
SKH
CSS
CSH
t
t
SKL
PD1
PD0
DIS
DIH
CS
SK
SV
DF
CC
X: Either V
Read (READ)
Write Enabled (WEN)
Write (WRITE)
Write to All Addresses (WRAL)
Write Disabled (WDS)
Erase (ERASE)
Chip Erase (ERAL)
= 5V ± 10%)
Min.
450
450
450
100
100
50
—
—
—
—
—
—
0
IH
or V
Typ.
Command
—
—
—
—
—
—
—
—
—
—
—
—
—
IL
1
2
3
3
Max.
500
500
500
100
10
—
—
—
—
—
—
—
1
MHz
Unit
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
2
Start
bit
1
1
1
1
1
1
1
Operating
code
10
00
01
00
00
11
00
11XXXXXX
01XXXXXX D15 ~ D0
00XXXXXX
10XXXXXX
Address
A7 ~ A0
A7 ~ A0
A7 ~ A0
D15 ~ D0
Data
—
—
—
—
—