BR9080 데이터 시트보기 (PDF) - ROHM Semiconductor
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BR9080 Datasheet PDF : 11 Pages
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Memory ICs
zCircuit operation
(1) Command mode
BR9080
Instruction
Start Bit
Read (READ)
1010
Write (WRITE)
1010
Erase / Write enable (EWEN)
1010
Erase / Write disable (EWDS)
1010
∗ : Means either VIH or VIL
Address and data are transferred from LSB.
BR9080 / BR9080F / BR9080RFV /
BR9016 / BR9016F / BR9016RFV
Op Code
100 A0
010 A0
0011
0000
Address
A1 A2 A3 A4 A5 A6 A7 A8
A1 A2 A3 A4 A5 A6 A7 A8
∗∗∗∗∗∗∗∗
∗∗∗∗∗∗∗∗
Data
D0 D1 − D14 D15
BR9016
Instruction
Start Bit
Read (READ)
1010
Write (WRITE)
1010
Erase / Write enable (EWEN)
1010
Erase / Write disable (EWDS)
1010
∗ : Means either VIH or VIL
Address and data are transferred from LSB.
Op Code
10 A0 A1
01 A0 A1
0011
0000
Address
A2 A3 A4 A5 A6 A7 A8 A9
A2 A3 A4 A5 A6 A7 A8 A9
∗∗∗∗∗∗∗∗
∗∗∗∗∗∗∗∗
Data
D0 D1 − D14 D15
(2) Writing enabled / disabled
H
SK
1
4
L
H
CS
L
8
12
16
ENABLE = 11
DISABLE = 00
H
DI
L
101
000
HIGH-Z
DO
H
R/B
WC
High or LOW
Fig.3
1) When CS is “HIGH” during power up, BR9080 / F / RFV, BR9016 / F / RFV comes up in the erase / write disabled
(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.
2) It is unnecessary to add the clock after 16th clock.
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