Rainbow Electronics BR9040RFV-W - Manual (Page 13)

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(3) Instruction Mode Cancel
1) Read instruction
32 clocks
START BIT
4 bit 4 bit 8 bit
16 bit
It is possible to be canceled for any timing.
DATA DO D15
OPCODE ADDRESS
SK
CS
DI
DO
WC HIGH or LOW
Fig.11
How to cancel : CS is brought High.
2) Write instruction
32 clocks
START BIT
4 bit
c
4 bit 8 bit 16 bit
DO D15 OPECODE ADDRESS DATA
SK
CS
DI
R / B
WC
t E / W
d b a
Fig.12
How to cancel
a CS is brought High to cancel the instruction, and WC may be either High or Low.
b In case that WC is brought High for a moment, or CS is brought High, the write instruction is canceled, the data of the
specified address is not changed.
c When WC is brought High, or the device is powered down (But the latter way is not recommended), the instruction is
canceled but the specified data is not guaranteed. Send the instruction again.
d When CS is brought High during R/B High, the device is reset and ready to receive a next instruction.
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