Datasheet

1−4
1.5 Terminal Functions
TERMINAL
I/O
DESCRIPTION
NAME NO.
I/O
DESCRIPTION
DM0 19 I/O Differential data-minus USB port 0: upstream
DM1 6 I/O Differential data-minus port 1: downstream
DM2 63 I/O Differential data-minus port 2: downstream
DP0 18 I/O Differential data-plus USB port 0: upstream
DP1 7 I/O Differential data-plus port 1: downstream
DP2 64 I/O Differential data-plus port 2: downstream
GND 5, 20, 24,
42, 59
— Power supply ground
OVCR1 4 I Port 1: Overcorrect indicator; Schmitt-trigger input, 100-µA active pullup
OVCR2 1 I Port 2: Overcorrect indicator; Schmitt-trigger input, 100-µA active pullup
P0.[0:7] 43, 44, 45,
46, 47, 48,
49, 50
I/O General-purpose I/O port 0 bits 0−7, Schmitt-trigger input, 100-µA active pullup, open-drain output
†
P1.[0:7] 31, 32, 33,
34, 35, 36,
40, 41
I/O General-purpose I/O port 1 bits 0−7, Schmitt-trigger input, 100-µA active pullup, open-drain output
†
P2.[0:7] 22, 23, 25,
26, 27, 28,
29, 30
I/O General-purpose I/O port 2 bits 0−7, Schmitt-trigger input, 100-µA active pullup, open-drain output
†
P3.0/S0/RXD 58 I/O
P3.0: General-purpose I/O port 3 bit 0, Schmitt-trigger input, 100-µA active pullup, open-drain output
†
P3.0/S0/RXD
58
I/O
S0: See Section 2.6.12
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-µA active pullup, open-drain output
†
P3.1/S1/TXD
57
I/O S1: See Section 2.6.12
I/O 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-µA active pullup, open-drain output
†
; 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-µA active pullup, open-drain output
†;
may support INT1
input, depending on configuration (see Figure 2−5)
P3.[4:7] 54, 53, 52,
51
I/O General-purpose I/O port 3 bit 4, Schmitt-trigger input, 100-µA active pullup, open-drain output
†
PUR 17 O Pullup resistor connection pin (3-state); push-pull CMOS output (±8 mA)
PWRO1 3 O Port 1: power on/off control signal; push-pull CMOS output (±8 mA)
PWRO2 2 O Port 2: power on/off control signal; push-pull CMOS output (±8 mA)
RST 13 I Controller master reset signal, Schmitt-trigger input, 100-µA active pullup
S2 8 I General-purpose input; can be used for VID/PID selection under firmware control. This input has no
internal pullup, so it must be driven/pulled either low or high and connot be left unconnected.
S3 9 I General-purpose input. This input has no internal pullup, so it must be driven/pulled either low or high
and connot 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
†
SELF/BUS 21 I USB power MODE select: self powered (HIGH), bus powered (LOW)
SUSP 16 O Suspend status signal: suspended (HIGH); unsuspended (LOW)
TEST0
‡
14 I Test input 0, Schmitt-trigger input, 100-µA active pullup
TEST1
‡
15 I Test input 1, Schmitt-trigger input, 100-µA active pullup
†
All open-drain output pins can sink up to 8 mA.
‡
The functions controlled by TEST0 and TEST1 are shown in the following table. Because these two pins have internal pullups, they can be left
unconnected for the default mode.