br9016 ROHM Co. Ltd., br9016 Datasheet - Page 5

• Manufacturer Part Number: br9016
• Description: 8k, 16k Bit Eeproms For Direct Connection To Serial Ports
• Manufacturer: ROHM Co. Ltd.

Memory ICs
(1) Command mode
BR9080
BR9016
(2) Writing enabled / disabled
1) When CS is “HIGH” during power up, BR9080 / F / RFV, BR9016 / F / RFV comes up in the erase / write disabled
2) It is unnecessary to add the clock after 16th clock.
Read (READ)
Write (WRITE)
Erase / Write enable (EWEN)
Erase / Write disable (EWDS)
Read (READ)
Write (WRITE)
Erase / Write enable (EWEN)
Erase / Write disable (EWDS)
Address and data are transferred from LSB.
Address and data are transferred from LSB.
Circuit operation
: Means either V
: Means either V
(EWDS) state. In order to be programmable, it must receive an enable (EWEN) instruction.
The device remains programmable until a disable (EWDS) instruction is entered, or until it is powered down.
Instruction
Instruction
SK
CS
DI
DO
R / B
WC
IH
IH
or V
or V
H
L
H
L
H
L
H
IL
IL
High or LOW
HIGH-Z
1
1
0
Start Bit
Start Bit
1
1010
1010
1010
1010
1010
1010
1010
1010
0
4
0
10 A0 A1
01 A0 A1
Op Code
Op Code
100 A0
010 A0
0011
0000
0011
0000
0
Fig.3
8
BR9080 / BR9080F / BR9080RFV /
A1 A2 A3 A4 A5 A6 A7 A8
A1 A2 A3 A4 A5 A6 A7 A8
A2 A3 A4 A5 A6 A7 A8 A9
A2 A3 A4 A5 A6 A7 A8 A9
ENABLE 11
DISABLE 00
BR9016 / BR9016F / BR9016RFV
Address
Address
12
D0 D1
D0 D1
16
Data
Data
D14 D15
D14 D15