Datasheet

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TUSB3210
Universal Serial Bus
General-Purpose Device Controller
SLLS466F – FEBRUARY 2001 – REVISED AUGUST 2007
Table 1-1. Terminal Functions (continued)
TERMINAL
I/O DESCRIPTION
NAME NO.
P2.[0:7] 22, 23, I/O General-purpose I/O port 2 bits 0–7, Schmitt-trigger input, 100- μ A active pullup, open-drain output
(2)
25, 26,
27, 28,
29, 30
P3.0/S0/RXD 58 I/O P3.0: General-purpose I/O port 3 bit 0, Schmitt-trigger input, 100- μ A active pullup, open-drain output
(2)
S0: See Section 2.6.5 .
RXD: Can be used as a UART interface
P3.1/S1/TXD 57 I/O P3.1: General-purpose I/O port 3 bit 1, Schmitt-trigger input, 100- μ A active pullup, open-drain output
(2)
S1: See Section 2.6.5 .
TXD: Can be used as a UART interface
P3.2 56 I/O General-purpose I/O port 3 bit 2, Schmitt-trigger input, 100- μ A active pullup, open-drain output
(2)
; INT0
only used internally (see Section 2.9.4 )
P3.3 55 I/O General-purpose I/O port 3 bit 3, Schmitt-trigger input, 100- μ A active pullup, open-drain output
(2)
; may
support INT1 input, depending on configuration (see Figure 2-5 )
P3.[4:7] 54, 53, I/O General-purpose I/O port 3 bits 4–7, Schmitt-trigger input, 100- μ A active pullup, open-drain output
(2)
52, 51
PUR 17 O Pullup resistor connection pin (3-state) push-pull CMOS output ( ± 4 mA)
RST 13 I Controller master reset signal, Schmitt-trigger input, 100- μ A active pullup
RSV 1, 4 Reserved (Do not connect these pins.)
S2 8 I General-purpose input, can be used for VID/PID selection under firmware control. This input has no
internal pullup; therefore, it must be driven/pulled either low or high and cannot be left unconnected.
S3 9 I General-purpose input. This input has no internal pullup; therefore, it must be driven/pulled either low or
high and cannot be left unconnected.
SCL 12 O Serial clock I
2
C; push-pull output
SDA 11 I/O Serial data I
2
C; open-drain output
(2)
SUSP 16 O Suspend status signal: suspended (HIGH); unsuspended (LOW)
TEST0
(3)
14 I Test input0, Schmitt-trigger input, 100- μ A active pullup
TEST1
(3)
15 I Test input1, Schmitt-trigger input, 100- μ A active pullup
TEST2 20 I Test input2, Schmitt-trigger input, 100- μ A active pullup. This pin is reserved for testing purposes and
should be left unconnected.
VCC 10, 39, — Power supply input, 3.3 V typical
62
VREN 38 I Voltage regulator enable: enable active-LOW; disable active-HIGH
X1 61 I 12-MHz crystal input
X2 60 O 12-MHz crystal output
(3) The functions controlled by TEST0 and TEST1 are shown in Table 1-2 . Because these pins have internal pullups, they can be left
unconnected for the default mode.
Table 1-2. Test0/Test1 Functions
TEST0 TEST1 Function
0 0 Selects 48-MHz clock input (from an oscillator or other onboard clock source)
0 1 Reserved for testing purposes
1 0 Reserved for testing purposes
1 1 Selects 12-MHz crystal as clock source (default)
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