Alcor Micro AU9226, Техническое справочное руководство

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Table 3.1 Pin Descriptions
Pin # Pin Name I/O Description
1 AVCC PWR 3.3V analog input power
2 AVSS PWR Analog ground
3 XTAL1 I 12 MHz crystal input
4 XTAL2 O 12 MHz crystal output
5 VCC5V PWR 5.0V input power from USB port
6 BVCC PWR 3.3V output power from internal regulator
7 BVSS PWR Ground pin of internal regulator
8 SWITCHN I
Button with internal pull-up for switching to next
system (0: Enable; 1: Normal)
9 AUDIOSWITCHN I
Audio ON/OFF switch with internal pull-up (1:
OFF; 0: ON)
10 BUS_PWRD I
Bus power selection (1: Device Self Power; 0: Bus
Power)
11 BEEP O
Audio output (4 KHz frequency) when system
switches
12 INTN O
Interrupt signal output to external MCU when
SWITCHMODE2='1' and EXTCPUMOD='1'
(falling-edge triggered)
13 GND Ground
14 GND Ground
15 ALE I
When not using external parallel MCU, it should be
pulled down. Address latch enable when
SWITCHMODE2='1' and EXTCPUMOD='1' (1: AD
bus is address; 0: AD bus is data)
16 CSN I
Chip enable for the MCU interface when
SWITCHMODE2='1' and EXTCPUMOD='1' (0:
Enable)
17 RDN I
Read strobe for the MCU interface when
SWITCHMODE2='1' and EXTCPUMOD='1' (0:
Enable)
18 DOWNUSB2_DP I/O DownPort2 DP
19 DOWNUSB2_DM I/O DownPort2 DM
20 DOWNUSB1_DP I/O DownPort1 DP
21 DOWNUSB1_DM I/O DownPort1 DM
22 WRN I
Read strobe for the MCU interface when
SWITCHMODE2='1' and EXTCPUMOD ='1' (0:
Enable; 1: Normal)
23 EXTCPUMOD I
External MCU mode selection (1: Parallel; 0:
Serial). Serial is the default mode.
24 VSS PWR Digital ground
AU9226 USB KVM Controller V1.01W
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