參數(shù)資料
型號: MSM6684B
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: 4,194,304-word x 1-bit Serial Register(4M×1串行話音寄存器)
中文描述: 4194304字× 1位串行寄存器(4分× 1串行話音寄存器)
文件頁數(shù): 7/9頁
文件大?。?/td> 97K
代理商: MSM6684B
Semiconductor
7/9
MSM6684B
PIN FUNCTIONS AND OPERATING MODES
Serial address input (SAD)
Pin used to enter start address for reading/writing. An address can be specified in units of 1024
words. 1024 words of address data can be entered through the pin as 13 bits (A0 to A12) of serial
data. The 13th bit must be A12 as a dummy address, however. The A12 input level must be either
"H" or "L".
Serial address strobe (
SAS
)
This is a clock pin for latching serial address data into an internal register.
Address transfer strobe (
TAS
)
This is an input pin for loading the internal address counter with serial address data latched in the
address register.
Read/write clock (
RWCK
)
This is a clock input pin for reading and writing information in the data register. The trailing edge
of
RWCK
triggers off internal operation. In the reading mode, information in the data register is
output to the DOUT pin. In the writing mode, the data register is loaded with DIN information.
At the leading edge of RWCK, the internal address counter is incremented automatically by +1.
Write enable (
WE
)
This is an input pin for selecting the read mode, the write mode, or the read-modify-write mode.
When
WE
is "H", the read mode is set up and, when
WE
is "L", the write mode is set up. When the
level is lowered from "H" to "L" with
RWCK
active, the read-modify-write mode is set up.
Data input (DIN)
This is a pin for entering write data. Information on the data input pin is latched when the trailing
edge of
RWCK
is encountered in the write mode and that of
WE
is encountered in the read/modify
mode.
Data output (DOUT)
The data output pin always provides high impedance as long as
RWCK
or
CS
is kept at "H". When
"H" or "L" information is read, the output pin set at "H" or "L", and information read until
RWCK
returns to "H" is held. In the early write mode, the output pin is maintained at high impedance,
so that, connect of DIN and DOUT enables "I/O common operation".
Chip selection (
CS
)
This is an input pin for disabling all input pins. This pin allows the use of two or more MSM6684B
devices with data input and output pins connected in parallel.
Test (TEST,
TEST
)
The TEST pin must always be fixed at "L" and the
TEST
pin at "H".
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