MAX3301EETJ Maxim Integrated, MAX3301EETJ Datasheet - Page 23

• Manufacturer Part Number: MAX3301EETJ
• Description: USB Interface IC
• Manufacturer: Maxim Integrated

Specifications of MAX3301EETJ

• Operating Supply Voltage: 3 V to 4.5 V
• Operating Supply Current: 5 uA

Table 8. Control Register 2 Description (Write to Address 06h to Set, Write to Address
07h to Clear)
Table 7. Control Register 1 Description (Write to Address 04h to Set, Write to Address
05h to Clear)
USB On-the-Go Transceivers and Charge Pumps
Note 8: To prevent a high-current state where the transceiver is both sourcing current to V BUS and sinking current from V BUS , the fol-
lowing logic is used to set bits 5, 6, and 7 of control register 2:
• Setting vbus_drv clears vbus_dischrg and vbus_chrg
• Setting vbus_dischrg clears vbus_drv and vbus_chrg, unless vbus_drv is set with the same command, in which case vbus_drv
• Setting vbus_chrg clears vbus_drv and vbus_dischrg, unless either of these bits are set with the same command, as shown in Table 9
BIT NUMBER
BIT NUMBER
clears the other bits
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
bdis_acon_en
vbus_dischrg
dm_pulldown
dp_pulldown
id_pulldown
dm_pullup
vbus_chrg
dp_pullup
SYMBOL
oe_int_en
SYMBOL
vbus_drv
______________________________________________________________________________________
suspend
dat_se0
uart_en
speed
—
—
S et to 0 for l ow - sp eed ( 1.5M b p s) m od e. S et to 1 for ful l - sp eed ( 12M b p s) m od e. Thi s
b i t chang es the d ata r ate onl y i f sp d _susp _ctl = 1 i n sp eci al - functi on r eg i ster 1.
Set to 0 for normal operating mode. Set to 1 for suspend mode. This bit changes
the operating mode only if spd_susp_ctl = 1 in sp eci al - functi on r eg i ster 1.
Set to 0 for VP_VM USB mode. Set to 1 for DAT_SE0 USB mode.
Not used.
Enables the transceiver (when configured as an A device) to connect its pullup
resistor if the B device disconnect is detected during HNP. Set to 0 to disable this
feature. Set to 1 to enable this feature.
Set to 0 to disable the interrupt output circuitry of OE/INT. Set to 1 to enable the
interrupt output circuitry of OE/INT.
Set to 0 to disable UART mode. Set to 1 to enable UART mode. This bit overrides
the settings of dminus_dir, dplus_dir, and gp_en bits.
Not used.
S et to 0 to d i sconnect the p ul lup resi stor to D+ . Set to 1 to connect the pul l up r esi stor to D +.
S et to 0 to d i sconnect the p ul l up r esi stor to D - . S et to 1 to connect the p ul l up r esi stor to D - .
Set to 0 to disconnect the pulldown resistor to D+. Set to 1 to connect the pulldown
resistor to D+.
Set to 0 to disconnect the pulldown resistor to D-. Set to 1 to connect the pulldown
resistor to D-.
Set to 0 to allow ID_IN to float. Set to 1 to connect ID_IN to GND.
S et to 0 to tur n V
Set to 0 to disconnect the V
discharge resistor (see Note 8).
Set to 0 to disconnect the V
charge resistor (see Note 8).
B U S
off. S et to 1 to d r i ve V
BUS
BUS
discharge resistor. Set to 1 to connect the V
charge resistor. Set to 1 to connect the V
OPERATION
OPERATION
B U S
thr oug h a l ow i m p ed ance ( see N ote 8) .
BUS
BUS
POWER-UP
POWER-UP
VALUE AT
VALUE AT
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
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