參數(shù)資料
型號(hào)： AT43USB326-AU
廠(chǎng)商： Atmel Corp.
英文描述： Multimedia USB Keyboard Controller with Embedded Hub
中文描述： 多媒體USB鍵盤(pán)控制器的嵌入式集線(xiàn)器
文件頁(yè)數(shù)： 4/102頁(yè)
文件大?。?/td> 511K
代理商： AT43USB326-AU
4
AT43USB326
3313D–USB–04/06
Signal Description
Name
Type
Function
V
CC
Power Supply/Ground
5V Digital Power Supply
V
SS1
,
2
Power Supply/Ground
Ground
CEXT1, 2
Power Supply/Ground
External Capacitors for Power Supplies
– High quality 2.2 μF capacitors must be
connected to CEXT1 and 2 for proper operation of the chip.
XTAL1
Input
Oscillator Input
– Input to the inverting oscillator amplifier.
XTAL2
Output
Oscillator Output
– Output of the inverting oscillator amplifier.
LFT
Input
PLL Filter
– For proper operation of the PLL, this pin should be connected through
a 0.01 μF capacitor in parallel with a 100
resistor in series with a 0.1 μF capacitor
to ground (VSS). Both capacitors must be high quality ceramic.
DPO
Bi-directional
Upstream Plus USB I/O
– This pin should be connected to CEXT1 through an
external 1.5 k
.
DMO
Bi-directional
Upstream Minus USB I/O
DP[2,3]
Bi-directional
Downstream Plus USB I/O
– Each of these pins should be connected to VSS
through an external 15 k
resistor. DP[2,3] and DM[2,3] are the differential signal
pin pairs to connect downstream USB devices.
DM[2,3]
Bi-directional
Downstream Minus USB I/O
– Each of these pins should be connected to VSS
through an external 15 k
resistor.
PA[0:7]
Bi-directional
Port A[0:7]
– Bi-directional 8-bit I/O port with controlled slew rate. These pins are
used as eight of the keyboard matrix column output strobes. PA[0:7] = COL[0:7].
PB[0:7]
Bi-directional
Port B[0:7]
– Bi-directional 8-bit I/O port controlled slew rate. These pins are used
as the eight of the keyboard matrix column output strobes: PB[0:7] = COL[8:15].
PC[0:7]
Bi-directional
Port C[0:7]
– Bi-directional 8-bit I/O port with internal pull-ups. These pins are used
as keyboard matrix row input signals. PC[0:7] = ROW [0:7].
PD[0:1]
Bi-directional
Port D[0:1]
– Bi-directional I/O ports.
PE[0:1]
Bi-directional
Port E[0:1]
– Bi-directional I/O port with controlled slew rate which can be used as
two additional keyboard column output strobes, COL 16, 17.
PE[4:7]
Bi-directional
PE[4:7]
have built-in series limiting resistors and can be used to drive LEDs
directly.
TEST
Input
Test Pin
– This pin should be tied to ground.
RESETN
Input
Reset
– Active Low.
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