BR93L66RF-WE2 Rohm Semiconductor, BR93L66RF-WE2 Datasheet - Page 8

• Manufacturer Part Number: BR93L66RF-WE2
• Description: IC EEPROM 4KBIT 2MHZ 8SOP
• Manufacturer: Rohm Semiconductor

Specifications of BR93L66RF-WE2

• Memory Size: 4K (256 x 16)
• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Speed: 2MHz
• Interface: Microwire, 3-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOP
• Clock Frequency: 2MHz
• Supply Voltage Range: 1.8V To 5.5V
• Memory Case Style: SOP
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (18-Jun-2010)
• Package /: RoHS Compliant
• Memory Configuration: 256 X 16
• Interface Type: Serial, Microwire
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Timing chart
1) Read cycle (READ)
2) Write cycle (WRITE)
3) Write all cycle (WRAL)
When the read command is recognized, input address data (16bit) is output to serial. And at that moment, at taking A0,
in sync with the rise of SK, "0" (dummy bit) is output. And, the following data is output in sync with the rise of SK.
This IC has address auto increment function valid only at read command. This is the function where after the above
read execution, by continuously inputting SK clock, the above address data is read sequentially. And, during the auto
increment, keep CS at "H".
In this command, input 16bit data (D15 ~ D0) are written to designated addresses (Am ~ A0). The actual write starts by
the fall of CS of D0 taken SK clock.
When STATUS is not detected, (CS = "L" fixed) Max. 5ms in conformity with tE/W, and when STATUS is detected (CS
= "H"), all commands are not accepted for areas where "L" (BUSY) is output from D0, therefore, do not input any
command.
In this command, input 16bit data is written simultaneously to all addresses. Data is not written continuously per one
word but is written in bulk, the write time is only Max. 5ms in conformity with tE/W.
CS
SK
DI
DO
CS
SK
DI
DO
CS
SK
DI
DO
*1 Start bit
High-Z
When data "1" is input for the first time after the rise of CS, this is recognized as a start bit. And when "1" is input after plural "0" are input, it is recognized as a start
bit, and the following operation is started. This is common to all the commands to described hereafter.
High-Z
High-Z
*
1
1
1
1
1
1
1
2
1
0
2
0
2
0
1
0
Am
Am
4
4
0
1
5
Fig. 37 Write all cycle
Fig. 35 Read cycle
Fig. 36 Write cycle
A1
A1
A0
A0
0
D15
D15 D14
D15
8/16
D14
D14
D1
D1
D1
n
D0
D0
D0
n
t
n
CS
t
CS
n+1
D15
*
2
t
E/W
t
E/W
BUSY
BUSY
D14
t
STATUS
STATUS
t
SV
SV
READY
READY
BR93L46-W : n=25, m=5
BR93L56/66-W : n=27, m=7
BR93L76/86-W : n=29, m=9
BR93L46-W : n=25
BR93L56/66-W : n=27
BR93L76/86-W : n=29
BR93L46-W : n=25, m=5
BR93L56/66-W : n=27, m=7
BR93L76/86-W : n=29, m=9