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參數(shù)資料
| 型號： | BR9040F |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | 1, 2, and 4k bit EEPROMs for direct connection to serial ports |
| 中文描述： | 1，2，和4K的，可直接連接到串行端口位的EEPROM |
| 文件頁數(shù)： | 14/17頁 |
| 文件大?。?/td> | 187K |
| 代理商： | BR9040F |
14
Memory ICs
BR9010 / BR9010F / BR9010FV / BR9020 / BR9020F /
BR9040 / BR9040F
1) During input in the write mode, CS must be LOW, but once writing starts, CS may be either HIGH or LOW.
However, if CS and WC share the same connection, both CS and WC should be set to LOW during writing oper-
ations.
(If the WC pin is set to HIGH during a writing operation, writing will be forcibly interrupted at that point. If this hap-
pens, the data for that address may be lost, in which case it should be rewritten to that address.)
2) Following input of a write command, CS goes HIGH. If CS is then set to LOW, data will be received from SK and
DI, because the command reception status has been entered.
If CS remains LOW following command input, however, without first going HIGH, command input will be can-
celed until CS is set to HIGH.
3) Starting from the rising edge of the 32nd clock, the R / B pin goes LOW after RSV has elapsed.
4) The R / B pin is LOW during writing operations. (Following the rising edge of SK after the last data D15 has been
read, the internal timer circuit is activated, and writing of data in the memory cell is automatically completed dur-
ing t
E / W
.) At this point, SK input may be either HIGH or LOW during t
E / W
.
5) Following input of a write command, if CS falls while SK is LOW, the R / B status can be displayed from the DO
pin. (See the section on READY / BUSY states.)
(6) READY / BUSY display (R / B pin and DO pin)
1) This display outputs the internal status signal; the R / B pin outputs the HIGH or LOW status at all times. The dis-
play 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.)
2) When writing data to a memory cell, the READY / BUSY display is output from the rise of the 32nd clock pulse of
the SK signal after t
SV
, from the R / B pin.
R / B display = LOW: writing in progress
(The internal timer circuit is activated, and after the t
E / W
timing has been created, the timer circuit stops automati-
cally. Writing of data to the memory cell is done during the t
E / W
timing, during which time other commands can-
not be received.)
R / B display = HIGH: command standby state
(Writing of data to the memory cell has been completed and the next command can be received.)
CS
DI
DO
READY
Clock
SK
BUSY
READY
READY
Write command
HIGH-Z
t
PD
t
OZ
HIGH-Z
BUSY
Fig.8 R / B status output timing
R / B
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BR9010 | 1, 2, and 4k bit EEPROMs for direct connection to serial ports |
| BR9010F | 1, 2, and 4k bit EEPROMs for direct connection to serial ports |
| BR9010FV | 1, 2, and 4k bit EEPROMs for direct connection to serial ports |
| BR9080 | 8k, 16k bit EEPROMs for direct connection to serial ports |
| BR9080AF-W | 8k, 16k bit EEPROMs for direct connection to serial ports |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BR9040F-D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Memory LSIs |
| BR9040FV-W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:メモリLSI |
| BR9040F-W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Memory LSIs |
| BR9040F-WE2 | 功能描述:電可擦除可編程只讀存儲器 3 WIRE SERIAL DIRECT CONNECT RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| BR9040RFVM-W | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Memory LSIs |
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