BS616LV2019
BSI
PIN DESCRIPTIONS
Name
Function
A0-A16 Address Input
These 17 address inputs select one of the 131,072 x 16-bit words in the RAM.
CE is active LOW and CE2 is active HIGH. Both chip enables must be active when
data read from or write to the device. If either chip enable is not active, the device is
deselected and is in a standby power mode. The DQ pins will be in the high
impedance state when the device is deselected. (48B BGA ignore CE2 pin)
CE Chip Enable 1 Input
CE2 Chip Enable 2 Input
WE Write Enable Input
The write enable input is active LOW and controls read and write operations. With the
chip selected, when WE is HIGH and OE is LOW, output data will be present on the
DQ pins; when WE is LOW, the data present on the DQ pins will be written into the
selected memory location.
OE Output Enable Input
The output enable input is active LOW. If the output enable is active while the chip is
selected and the write enable is inactive, data will be present on the DQ pins and they
will be enabled. The DQ pins will be in the high impedance state when OE is inactive.
Lower byte and upper byte data input/output control pins.
LB and UB Data Byte Control Input
DQ0 - DQ15 Data Input/Output
Ports
These 16 bi-directional ports are used to read data from or write data into the RAM.
Vcc
Power Supply
Ground
Gnd
TRUTH TABLE
MODE
CE
H
CE2 (1) WE
OE
X
LB
X
UB
D0~D7
High Z
High Z
High Z
High Z
Dout
D8~D15
High Z
High Z
High Z
High Z
Dout
Vcc CURRENT
X
L
X
X
X
X
H
X
L
ICCSB , ICCSB1
Not selected
(Power Down)
X
X
X
ICCSB , ICCSB1
X
L
ICCSB , ICCSB1
X
H
X
H
X
H
H
X
Output Disabled
Read
ICC
ICC
ICC
ICC
ICC
ICC
ICC
L
H
L
L
L
H
H
H
L
L
L
High Z
Dout
Dout
H
L
High Z
Din
L
Din
Write
X
H
L
L
X
Din
H
Din
X
1. 48B BGA ignore CE2 condition.
Revision 1.2
May 2004
R0201-BS616LV2019
2
BSI [ BRILLIANCE SEMICONDUCTOR ]
