SMSC USB2512Ai ユーザーズマニュアル
Industrial Temperature Rated USB 2.0 Hi-Speed 2-Port Hub Controller
Datasheet
SMSC USB2512Ai
11
Revision 1.97 (08-11-08)
DATASHEET
Table 3.2 SMBus or EEPROM Interface Behavior
CFG_SEL1
CFG_SEL0
SMBUS OR EEPROM INTERFACE BEHAVIOR
0
0
Internal Default Configuration
Strap Options Enabled
0
1
Configured as an SMBus slave for external download of user-defined
descriptors
descriptors
SMBus slave address 58 (0101100x)
Strap Options Disabled
All Settings Controlled by Registers
1
0
Internal Default Configuration
Strap Options Enabled
Bus Power Operation
1
1
2-Wire I
2
C EEPROMS are supported
Strap Options Disabled
All Settings Controlled by Registers
Table 3.3 Power, Ground, and No Connect
PACKAGE SYMBOL
36-QFN EMB
FUNCTION
VDD18
14
VDD Core
This pin must have a 1.0
μ
F (or greater) ±20% (ESR <0.1
Ω
) capacitor to
VSS.
VDD33PLL
36
VDD 3.3 PLL Regulator Reference
+3.3V power supply for the PLL. If the internal PLL 1.8V regulator
is enabled, then this pin acts as the regulator input.
is enabled, then this pin acts as the regulator input.
VDD18PLL
34
VDD PLL
This pin must have a 1.0
μ
F (or greater) ±20% (ESR <0.1
Ω
) capacitor to
VSS.
VDDA33
5
10
29
29
VDD Analog I/O
+3.3V Filtered analog PHY power, shared between adjacent ports.
VDD33/VDD33CR
23
15
15
VDDIO/VDD 3.3 Core Regulator Reference
+3.3V power supply for the Digital I/O - If the internal core regulator is
enabled, then VDD33CR acts as the regulator input.
enabled, then VDD33CR acts as the regulator input.
NC
6
7
8
9
7
8
9
18
19
20
21
19
20
21
No Connect
No trace or signal should be routed or attached to these pins.