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Cypress Semiconductor SL811HS Specifikace Strana 20

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SL811HS
Document #: 38-08008 Rev. *A Page 20 of 29
6.2.3 SL811HST-AC USB Host Controller Pins Description
The SL811HST-AC is packaged in a 48-pin TQFP. The device requires a 3.3VDC power source. The SL811HST-AC requires an
external 12 or 48 MHz crystal or Clock.
Table 6-2. SL811HST-AC Pin Assignments and Definitions
Pin No. Pin Type Pin Name Pin Description
1 NC NC NC
2 NC NC NC
3 IN nWR Write Strobe Input. An active LOW input used with nCS to Write to
registers/data memory.
4 IN nCS Active LOW SL811HST-AC Chip select. Used with nRD and nWr when
accessing SL811HT.
5 IN CM Clock Mode. Select 12-MHz/48-MHz Clock Source.
[9]
6 VDD1 +3.3 VDC Power for USB Transceivers. V
DD1
may be connected to V
DD
.
7 BIDIR DATA + USB Differential Data Signal HIGH Side
8 BIDIR DATA - USB Differential Data Signal LOW Side
9 GND USB GND Ground Connection for USB
10 NC NC NC
11 NC NC NC
12 NC NC NC
13 NC NC NC
14 NC NC NC
15 VDD +3.3 VDC SL811HST-AC Device V
DD
Power
[10]
16 IN CLK/X1 Clock or External Crystal X1 connection
[11]
17 OUT X2 External Crystal X2 connection
18 IN NRST SL811HST-AC Device active low reset input
19 OUT INTRQ Active HIGH Interrupt Request output to external controller
20 GND GND SL811HST-AC Device Ground
21 BIDIR D0 Data 0. Microprocessor Data/(Address) Bus.
22 NC NC NC
23 NC NC NC
24 NC NC NC
25 NC NC NC
26 NC NC NC
27 BIDIR D1 Data 1. Microprocessor Data/(Address) Bus.
28 BIDIR D2 Data 2. Microprocessor Data/(Address) Bus.
29 BIDIR D3 Data 3. Microprocessor Data/(Address) Bus.
30 GND GND SL811HST-AC Device Ground
31 BIDIR D4 Data 4. Microprocessor Data/(Address) Bus.
32 BIDIR D5 Data 5. Microprocessor Data/(Address) Bus.
Notes:
9. The CM Clock Multiplier pin should be tied HIGH for a 12-MHz clock source and tied to ground for a 48-MHz clock source. In SL11H, this pin was designated
as ALE input pin.
10. VDD can be derived from the USB supply. See diagram.
11. The X1/X2 Clock requires external 12- or 48-MHz matching crystal or clock source.
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