Figure 3.2 usb2641 48-pin qfn, Datasheet, Indicates pins on the bottom of the device – SMSC USB2640i User Manual
Page 12
Ultra Fast USB 2.0 Multi-Format Flash Media Controller/USB Hub Combo
Revision 2.0 (10-03-08)
12
SMSC USB2640/USB2641
DATASHEET
Figure 3.2 USB2641 48-Pin QFN
Thermal Slug
(must be connected to VSS)
SMSC
USB2641
(Top View QFN-48)
Indicates pins on the bottom of the device .
nRESET
38
VBUS_DET
39
GPIO1 / LED1 / TXD
37
TEST
40
VDDA33
41
USB-
43
XTAL2
44
XTAL1 (CLKIN)
45
RBIAS
48
VDDA33
47
VDD18PLL
46
USB+
42
VD
D
A
3
3
1
US
B
DN
_
D
M
2
2
U
SBD
N
_
D
P
2
3
US
B
DN
_
D
M
3
4
U
SBD
N
_
D
P
3
5
P
R
TC
TL
2
6
P
R
TC
TL
3
7
SP
I_
C
E
_
N
8
SPI
_
C
LK
/ G
PI
O
4
/
SC
L
9
VD
D
3
3
10
SPI
_D
I
11
S
P
I_
D
O
/
GP
IO
5
/ S
D
A
/
S
P
I_
S
P
D
_S
E
L
12
21
SD_CLK / MS_BS
20
SD_D6 / MS_D7
19
SD_D7 / MS_D6
18
SD_D0 / MS_D4
17
VDD18
16
SD_D1 / MS_D5
15
VDD33
14
GPIO15 / SD_nCD
13
GPIO6 / SD_WP / MS_SCLK
23
SD_D5 / MS_D1
22
NC
24
SD_CMD / MS_D0
35
GP
IO
2
/
R
X
D
34
G
P
IO
1
0 (
C
R
D
_P
WR
)
33
VD
D
3
3
32
SD
_D
3
/
M
S
_D
3
31
G
P
IO
12
/
M
S
_I
NS
30
SD
_D
4
/
M
S
_D
2
29
GP
IO
1
4
28
NC
36
SD
_D
2
27
NC
26
NC
25
VD
D
3
3