Rainbow Electronics br9080af-w - Manual (Page 6)

BR9080AF-W / BR9080ARFV-W / BR9080ARFVM-W /
Memory ICs BR9016AF-W / BR9016ARFV-W / BR9016ARFVM-W
6/12
!
! ! ! Circuit operation
(1) Command mode
BR9080A
1010 100 A0 A1 A2 A3 A4 A5 A6 A7 A8
A1 A2 A3 A4 A5 A6 A7 A8 1010 010 A0
1010 0011
∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
D0 D1 − D14 D15
1010 0000
Read (READ)
Write (WRITE)
Write enable (WEN)
Write disable (WDS)
∗ : Means either V IH or V IL
Address and data are transferred from LSB.
Instruction Start Bit Op Code Address Data
BR9016A
1010 10 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9
A2 A3 A4 A5 A6 A7 A8 A9 1010 01 A0 A1
1010 0011
∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗
D0 D1 − D14 D15
1010 0000
Read (READ)
Write (WRITE)
Write enable (WEN)
Write disable (WDS)
∗ : Means either V IH or V IL
Address and data are transferred from LSB.
Instruction Start Bit Op Code Address Data
(2) Writing enabled / disabled
High or LOW
Fig.3
1
1
HIGH-Z
H
SK
CS
DI
DO
R / B
WC
L
H
L
H
L
H
0 1 0 0 0
4 8
ENABLE = 11
DISABLE = 00
12 16
1) When CS is “HIGH” during power up, BR9080AF-W / ARFV-W / ARFVM-W, BR9016AF-W / ARFV-W / ARFVM-W
comes up in the write disabled (WDS) state. In order to be programmable, it must receive a write enable (WEN)
instruction.
The device remains programmable until a disable (WDS) instruction is entered, or until it is powered down.
2) It is unnecessary to add the clock after 16th clock.