SL811HS
USB Host Controller Pins Description
The SL811HST-AXC is packaged in a 48-pin TQFP. These devices require a 3.3 VDC power source and an external 12 or 48 MHz
crystal or clock..
Table 34. Pin and Signal Description for Pins
48-Pin TQFP
Pin Type
Pin Name
Pin Description
AXC Pin No.
1
2
3
NC
NC
IN
NC
NC
No connection.
No connection.
nWR
Write Strobe Input. An active LOW input used with nCS to write to
registers/data memory.
4
IN
nCS
Active LOW 48-Pin TQFP Chip select. Used with nRD and nWr when
accessing the 48-Pin TQFP.
5[5]
6
IN
VDD1
BIDIR
BIDIR
GND
NC
CM
+3.3 VDC
DATA +
DATA -
USB GND
NC
Clock Multiply. Select 12 MHz/48 MHz Clock Source.
Power for USB Transceivers. VDD1 may be connected to VDD
USB Differential Data Signal HIGH Side.
USB Differential Data Signal LOW Side.
Ground Connection for USB.
No connection.
.
7
8
9
10
11
12
13
14
15[6]
16
NC
NC
No connection.
NC
NC
No connection.
NC
NC
No connection.
NC
NC
No connection.
VDD
IN
+3.3 VDC
CLK/X1
Device VDD Power.
Clock or External Crystal X1 connection. The X1/X2 Clock requires external
12 or 48 MHz matching crystal or clock source.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
OUT
IN
X2
nRST
INTRQ
GND
D0
External Crystal X2 connection.
Device active low reset input.
Active HIGH Interrupt Request output to external controller.
Device Ground.
OUT
GND
BIDIR
NC
Data 0. Microprocessor Data/Address Bus.
No connection.
NC
NC
NC
No connection.
NC
NC
No connection.
NC
NC
No connection.
NC
NC
No connection.
BIDIR
BIDIR
BIDIR
GND
BIDIR
BIDIR
D1
Data 1. Microprocessor Data/Address Bus.
Data 2. Microprocessor Data/Address Bus.
Data 3. Microprocessor Data/Address Bus.
Device Ground.
D2
D3
GND
D4
Data 4. Microprocessor Data/Address Bus.
Data 5. Microprocessor Data/Address Bus.
D5
Notes
5. The CM Clock Multiplier pin must be tied HIGH for a 12 MHz clock source and tied to ground for a 48 MHz clock source.
6. VDD can be derived from the USB supply. See Figure 5 on page 20.
Document 38-08008 Rev. *F
Page 21 of 32
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