參數(shù)資料
型號: M66287FP
廠商: Mitsubishi Electric Corporation
英文描述: 262144-word x 8-bit x 3-FIELD MEMORY
中文描述: 262144字× 8位× 3場記憶
文件頁數(shù): 11/21頁
文件大?。?/td> 196K
代理商: M66287FP
MITSUBISHI <DIGITAL ASSP>
M66287FP
262144-word x 8-bit x 3-FIELD MEMORY
2002 MITSUBISHI ELECTRIC CORPORATION
11
POWER - ON
After power-on, this IC initializes some circuits of internal FIFO (1.8 V), using the built-in power-on reset circuit.
This power-on reset is performed by using the V
CC
18 = 1.8 V system power supply.
Either of the following conditions (1) or (2) should be met according to the power-on time of the V
CC
18.
(1) When the power-on time of the V
CC
1.8 is 1 msec or less:
Some circuits of internal FIFO are initialized by the built-in power-on reset circuit. No restriction is imposed on the
power-on sequence between V
CC
18 and V
CC
IO = 3.3 V system power supply. When powering on again after power-on,
provide an interval of 100 ms or more for the V
CC
18. At this time, the TEST1 (pin 99) pin should be fixed at "L".
VCC18
GND
VCC18 x 10%
VCC18 x 10%
100ms(min)
VCC18
1ms(max)
(2) When the power-on time of the V
CC
18 is more than 1 msec:
Some circuits of internal FIFO should be initialized by the TEST1 (pin 99) pin.
Input a initialize reset pulse of 200 ns or more after the power supplies (V
CC
IO, V
CC
18) reach to the V
CC
level.
There is no problem even if reaching to the V
CC
level on which power supply.
VCC18
GND
VCC18
TEST1
VCCIO
1ms or more
200ns(min)
200ns(min)
VCCIO
GND
3.0V~3.6V
VCCIO
3.0V~3.6V
1.62V~1.98V
GND
Note : Some circuits of internal FIFO can be initialized by the TEST1 pin even if the power-on time of the V
CC
18 is 1
msec or less.
Note : Important matter;
Provide write reset cycles and read reset cycles of 100 cycles or more, respectively after the VCC reaches
to the specified voltage after power-on.
When inputting a reset pulse using the TEST1 (pin 99) pin, provide write reset cycles and read reset cycles
of 100 cycles or more, respectively after inputting a reset pulse at power-on.
There is no problem in this reset operation if a total of 100 cycles or more is achieved, even if
discontinuous reset input is made.
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