AU9228 Datasheet, PDF (11/23 Pages) List of Unclassifed Manufacturers – USB KVM Controller

Pin #
24
25
26
Pin Name
DOWNUSB2_DM
DOWNUSB1_DP
DOWNUSB1_DM
27
WRN
28
EXTCPUMOD
29
VSS
30
VCC
31
SWITCHMODE0
32
SWITCHMODE1
33
SWITCHMODE2
34
RESERVED
35
RESERVED
36
PS2_CLK
37
PS2_DAT
38
D0
39
D1
40
D2
I/O
I/O
I/O
I/O
I
I
PWR
PWR
I
I
I
I/O
I/O
I/O
I/O
I/O
Description
DownPort2 DM
DownPort1 DP
DownPort1 DM
Read strobe for the MCU interface when
SWITCHMODE2='1' and EXTCPUMOD ='1' (0:
Enable; 1: Normal)
External MCU mode selection (1: Parallel; 0:
Serial). Serial is the default mode.
Digital ground
3.3V digital input power
Switch mode selection (SW0, SW1) for internal
hotkey mode when SWITCHMODE2='0' and
D2='0', it’s defined as:
(0, 0): [Scroll][Scroll] mode (default)
(0, 1): [Caps Lock][Caps Lock] mode
(1, 0): [Num Lock][Num Lock] mode
(1, 1): [Ctrl][Shift] mode (left-hand side)
Enable external MCU mode (1: Enable; 0:
Disable). Disable is the default setting.
Reserved
Reserved
PS2 clock signal (external pull-up required)
PS2 data signal (external pull-up required)
Bit 0 with internal pull-up in address/data bus of
MCU interface when SWITCHMODE2='1' and
EXTCPUMOD='1'. It also provides alternative
functions:
I2C bus SDA signal (slave mode) when
SWITCHMODE2='1' and EXTCPUMOD='0'
I2C bus SDA signal (master mode) when
SWITCHMODE2='0' and D2='1'
Bit 1 with internal pull-up in address/data bus of
MCU interface when SWITCHMODE2='1' and
EXTCPUMOD='1'. It also provides alternative
functions:
I2C bus SCL signal (slave mode) when
SWITCHMODE2='1' and EXTCPUMOD='0'
I2C bus SCL signal (master mode) when
SWITCHMODE2='0' and D2='1'
Bit 2 with internal pull-down in address/data bus of
MCU interface when SWITCHMODE2='1' and
EXTCPUMOD='1'. It also provides alternative
functions:
I2C bus address 0 (slave mode) when
SWITCHMODE2='1' and EXTCPUMOD='0'
I2C bus master mode enable bit when
SWITCHMODE2='0'
AU9228 USB KVM Controller V1.01W
5