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ST72681 Datasheet(PDF) 8 Page - STMicroelectronics

No. de pieza ST72681
Descripción Electrónicos  USB 2.0 high-speed Flash drive controller
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72681 Datasheet(HTML) 8 Page - STMicroelectronics

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Application schematics
ST72681
8/32
3
Application schematics
ST72681/R20 only supports single NAND Flash Chip Enable configuration (one NAND
device with one Chip Enable signal). Note that pins NAND_RnB2, NAND_CE2, NAND_CE3
and NAND_CE4 should remain unconnected.
ST72681/R21 can support up to four NAND Flash Chip Enable signals. The application can
use one of the following configurations:
One NAND device with four Chip Enable signals; NAND_CE1, NAND_CE2,
NAND_CE3 and NAND_CE4 are used.
One NAND device with two Chip Enable signals; NAND_CE1 and NAND_CE2 are
used.
One NAND device with one Chip Enable signal; only NAND_CE1 is used.
Two NAND devices with two Chip Enable signals; NAND_CE1 and NAND_CE2 are
used to select the first NAND device and NAND_CE3 and NAND_CE4 to select the
second NAND device.
Two NAND devices with one Chip Enable signal; NAND_CE1 and NAND_CE2 are
used to select is used to select the first NAND device and the 2nd NAND device,
respectively.
4 NAND devices with 1Chip Enable signal; NAND_CE1 selects the first NAND device,
NAND_CE2 the 2nd NAND device, NAND_CE3 to select the third, and NAND_CE4 to
select the fourth NAND device.
Figure 3.
Application schematic
LED2
RED L ED
R2
220
V33
LED1
GREEN L ED
R1
220
LED2
LED1
C13
10nF
C11
470nF
RESET
RO
S1
Read O nly
NAND_RnB
C16
18pF
C15
18pF
VBUS
1
D-
2
D+
3
GND
4
J1
USB CO N
USB_V5
R5
11.
3K 1%
C1
100nF
DM
DP
C8
10nF
C6
10nF
C9
10nF
C12
10nF
R4
10K
R3
4.
7K
C5
220nF
V33
V18_USB
V18_USB
V18_USB
C2
1uF
+ C4
4.
7uF
Vin
1
INHIBIT
3
Vout
5
GND
2
BYPASS
4
U1
LD3985M33R_SOT23-
5L
USB_V5
C3
10nF
V33
V33
On BoardFlash1
U2
C7
10nF
C10
10nF
On BoardFlash2
NAND_RnB2
V33
V33
R_Toshiba_config
R_Multi_CE_config
V33
2
3
1
4
XT1
CRYSTAL
12M H_NX4025DA
Vin
3
Vout
2
GND
UU1
AM E8800_SO T23
R6
500
R7
0
R8
0
NAND W P
36
READ O NL Y
35
EEPRO M SCL
34
VSS_3
25
RESET
29
VSS_2
33
VDD33_2
32
NC
31
NC
30
LED2
28
LED1
27
NAND AL E
26
VDDA
1
OSCIN
2
OSCOUT
3
VSSA
4
RREF
5
VSSBL
11
USBDP
9
USBDM
10
VDD3
8
VDDBL
12
VSSC
6
VDDC
7
U?
ST72681_QF
P48
V33
C17
100nF
V33
C14
10nF
U3
V33
V33
R_Single_CE_config
R_Dual_CE_config
R9
0
R10
0
NAND_CE2
NAND_CE3
U5
V33
V33
On BoardFlash4
U4
V33
V33
On BoardFlash3
C18
100nF
C19
100nF
C20
100nF
C21
100nF
V33
V33
Decoupling capacitors to be located close to U1 V33 inputs
V33
Decoupling capacitors to be located close to U2,U3,U4 & U5 V33 inputs
NAND_W P
NAND_W P
NAND_W P
NAND_W P
On Board Flash 2-4 only available on ST72681 /R21


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