Datasheet
MAX3301E/MAX3302E
USB On-the-Go Transceivers and Charge Pumps
_______________________________________________________________________________________ 9
Pin Description
PIN
MAX3302E
28-PIN TQFN
MAX3301E
32-PIN TQFN
UCSP/
WLP
NAME FUNCTION
1 2 D2 DAT_VP
System-Side Data Input/Output. DAT_VP is an input if OE/INT is logic 0.
DAT_VP is an output if OE/INT is logic 1. Program the function of DAT_VP
with the dat_se0 bit (bit 2 of control register 1, see Table 7).
2, 25 3, 29 D1, E3 V
CC
Input Power Supply. Connect a +3V to +4.5V supply to V
CC
and bypass to
GND with a 1µF capacitor. The supply range enables direct powering from
one Li+ battery.
3, 9, 23
1, 4, 9, 12, 17,
25, 28
— N.C. No Connection. Not internally connected.
4 5 C1 C- Charge-Pump Flying-Capacitor Negative Terminal
5 6 C2 SE0_VM
System-Side Data Input/Output. SE0_VM is an input if OE/INT is logic 0.
SE0_VM is an output if OE/INT is logic 1. Program the function of SE0_VM
with the dat_se0 bit (bit 2 of control register 1, see Table 7).
6, 18 7, 21 B1, C5 GND Ground
7 8 A1 SDA I
2
C-Compatible Serial Data Interface. Open-drain data input/output.
8 10 B2 SCL I
2
C-Compatible Serial Clock Input
10 11 A2 OE/INT
O utp ut E nab l e. O E/INT contr ol s the i np ut or outp ut status of D AT_V P /S E 0_V M
and D + /D - . W hen O E/INT i s l og i c 0, the d evi ce i s i n tr ansm i t m od e. W hen
O E/INT i s l og i c 1, the d evi ce i s i n r ecei ve m od e. When i n susp end m od e,
O E/INT can b e p r og r am m ed to functi on as an i nter r up t outp ut that d etects the
sam e i nter r up ts as
INT. The oe_i nt_en b i t ( b i t 5 of contr ol r eg i ster 1, see Tab l e
7) enab l es and d i sab l es the i nter r up t ci r cui tr y of O E/INT. The i r q _m od e b i t ( b i t 1
of sp eci al - functi on r eg i ster 2, see Tab l e 15) p r og r am s the outp ut confi g ur ati on
of INT and O E/INT as op en- d r ai n or p ush- p ul l .
11 13 A3 RCV
D+ and D- Differential Receiver Output. In receive mode (see Table 4), when
D+ is high and D- is low, RCV is high. In receive mode, when D+ is low and
D- is high, RCV is low. RCV is low in suspend mode.
12 14 B3 SPD
Speed-Selector Input. Connect SPD to GND to select the low-speed data rate
(1.5Mbps). Connect SPD to V
L
to select the full-speed data rate (12Mbps).
Disable the SPD input by writing a 1 to spd_susp_ctl (bit 1 in special-function
register 1, see Table 14). The speed bit (bit 0 of control register 1, see Table
7) determines the maximum data rate of the MAX3301E/MAX3302E when the
SPD input is disabled.
13 15 A4 V
L
System-Side Logic-Supply Input. Connect to the system’s logic-level power
supply, +1.65V to +3.6V. This sets the maximum output levels of the logic
outputs and the input thresholds of the logic inputs. Bypass to GND with a
0.1µF capacitor.
14 16 A5 SUS
Active-High Suspend Input. Drive SUS low for normal USB operation. Drive
SUS high to enable suspend mode. RCV asserts low in suspend mode.
Disable the SUS input by writing a 1 to spd_susp_ctl (bit 1 in special-function
register 1, see Table 14). The suspend bit (bit 1 of control register 1, see
Table 7) determines the operating mode of the MAX3301E/MAX3302E when
the SUS input is disabled.