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參數(shù)資料
| 型號： | μPD72012 |
| 廠商： | NEC Corp. |
| 英文描述： | Hub Controller For USB(集線器控制器) |
| 中文描述： | 集線器控制器的USB（集線器控制器） |
| 文件頁數(shù)： | 8/40頁 |
| 文件大?。?/td> | 342K |
| 代理商： | ΜPD72012 |
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8
Preliminary Data Sheet S13918EJ2V0DS00
μ
PD72012
(2/3)
Pin No.
Note 1
Pin Name
I/O
Signal Name
Function
18(24)
AV
DD1
-
AVDD1
Power supply pin of on-chip clock drive circuit.
To stabilize the power supply, connect directly to a stable power
supply using the shortest wire possible or connect to GND via a
capacitor along the wire (3.3-V input).
19(25)
CLK / X2
I
CLOCK / XTAL
When you input a clock signal from an oscillator, input at the 48-MHz
CMOS level (5 V can be input).
When using a 4-MHz crystal oscillator, connect the oscillator to this
pin.
20(26)
X1
I
XTAL
When using a 4-MHz crystal oscillator, connect the oscillator to this
pin.
21(27)
AGND1
-
AGND1
GND pin of on-chip clock drive circuit.
Connect directly from low-impedance GND.
22(28)
AGND2
-
AGND2
GND pin of on-chip frequency multiplier (PLL).
Connect directly from low-impedance GND.
23(29)
AV
DD2
-
AVDD2
Power supply pin of on-chip frequency multiplier (PLL).
To stabilize the power supply, connect directly to a stable power
supply using the shortest wire possible or connect to GND via a
capacitor along the wire (3.3 V input).
24(30)
DV
DD
-
DVDD
(TS1)
Test pin of
μ
PD72012 (corresponds to TS1 pin in
μ
PD72011).
Connect to digital V
DD
.
25(31)
DGND
(Buffer)
-
DGND
(Buffer)
Connect to digital GND. Since this pin is the GND for the internal
outer buffer, connect it to a stabilized independent GND.
26(32)
CS1
I
PORTCURRENT1
Low active input pin that inputs overcurrent states detected by
external circuit of downstream port #1.
When not using this pin, connect it directly to V
DD
.
Note 2
27(33)
CS2
I
PORTCURRENT2
Low active input pin that inputs overcurrent states detected by
external circuit of downstream port #2.
When not using this pin, connect it directly to V
DD
.
Note 2
28(34)
CS3
I
PORTCURRENT3
Low active input pin that inputs overcurrent states detected by
external circuit of downstream port #3.
When not using this pin, connect it directly to V
DD
.
Note 2
29(35)
CS4
I
PORTCURRENT4
Low active input pin that inputs overcurrent states detected by
external circuit of downstream port #4.
When not using this pin, connect it directly to V
DD
.
Note 2
30(36)
CS5
I
PORTCURRENT5
Low active input pin that inputs overcurrent states detected by
external circuit of downstream port #5.
When not using this pin, connect it directly to V
DD
.
Note 2
Notes 1.
Pin numbers for QFP are shown in ( ).
For details, refer to
Table 1-3
in
1.2 Tables by Pin Function
.
2.
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