br9016 ROHM Co. Ltd., br9016 Datasheet - Page 8

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

Memory ICs
(5) READY / BUSY display (R / B pin and DO pin: BR9080 / F / RFV, BR9016 / F / RFV)
1) This display outputs the internal status signal; the R / B pin outputs the HIGH or LOW status at all times. The display
2) When writing data to a memory cell, the READY / BUSY display is output from the rise of the 32nd clock pulse of the
1) D0 will output R / B status after CS is held low during SK=L, until CS is held high.
Note : The document may be strategic technical data subject to COCOM regulations.
can also be output from the DO pin. Following completion of the writing command, if CS falls while SK is LOW, either
HIGH or LOW is output. (The display can also be output without using the R / B pin, leaving it open.)
SK signal after t
(The internal timer circuit is activated, and after the t
Writing of data to the memory cell is done during the t
received.)
(Writing of data to the memory cell has been completed and the next command can be received.)
R / B display = LOW: writing in progress
R / B display = HIGH: command standby state
SK
DI
DO
R / B
CS
SV
, from the R / B pin.
READY
Write command
HIGH-Z
Clock
Fig.8 R / B Status Output timing chart
E / W
timing has been created, the timer circuit stops automatically.
E / W
BR9080 / BR9080F / BR9080RFV /
t
PD
BR9016 / BR9016F / BR9016RFV
timing, during which time other commands cannot be
BUSY
BUSY
READY
READY
t
OZ
HIGH-Z