Lattice Semiconductor XP2 Advanced User Manual page 15

Lattice Semiconductor
Table 20. CompactFlash Connection (Continued)
Pin # Function
24 WP/IOIS16/IOCS16
25
USB 1.1
For implementing the USB interface, the LatticeXP2 board contains a USB 1.1 transceiver MAX3454EETE (or
NCN2500MNR2 from On Semiconductor), a type-A connector and a type-B USB connector. Note there is a third
USB connector, which is used for the built-in USB download cable, described later in this document.
Table 21. Header Settings for Configuring USB Interface as USB Host
Header/Connector
J21
J22 (D+)
J23 (D-)
J24
J16 (USB type A)
J20 (USB type B)
Table 22. Header Settings for Configuring USB Interface as USB Device
Header/Connector
J21
J22 (D+)
J23 (D-)
J24
J16 (USB type A)
J20 (USB type B)
The connections between the USB 1.1 transceiver MAX3454EETE (or NCN2500MNR2 from On Semiconductor)
and the LatticeXP2 FPGA are shown in Table .
Table 23. Connections Between USB 1.1 Transceiver and LatticeXP2
Pin # MAX3454EETE NCN2500MNR2 LatticeXP2 I/O
1 SPD
2 RCV
3 VP
4 VM
5 NC
6 GND
7 SUS
8 NC
9 OE#
10 D-
11 D+
12 Vtrm
LatticeXP2 I/O
D9
CD2 A9
Jumper Position
Pin 1 and 2
Pin 1 and 2
Pin 1 and 2
Pin 1 and 2
—
—
Jumper Position
Pin 2 and 3
Pin 2 and 3
Pin 2 and 3
Pin 2 and 3
—
—
DSPD
RCV
VP
VM
EN_Vobus#
GND
SPND
NC
OE#
D-
D+
Vreg
Pin #
49
50
Drive USB transceiver ENUM pin to GND to disconnect the internal 1.5K
resistor between Vtrm and D+ or D-.
Pull D+ signal low through an external 15K resistor.
Pull D- signal low through an external 15K resistor.
Provide 5V power to the external USB device.
Type A is used while implementing USB host.
This connector is not used in this configuration.
Drive USB transceiver ENUM pin to 3.3V to connect the internal 1.5K
resistor between Vtrm and D+ or D-.
Disconnect D+ signal from the external 15K pull-down.
Disconnect D- signal from the external 15K pull-down.
No 5V power is provided when implementing USB device.
This connector is not used in this configuration.
Type A is used while implementing USB host.
D4 Connect to LatticeXP2 bank 7 I/O
E3 Connect to LatticeXP2 bank 7 I/O
C1 Connect to LatticeXP2 bank 7 I/O
D1 Connect to LatticeXP2 bank 7 I/O
— Connect to 3.3V
— Connect to GND
E1 Connect to LatticeXP2 bank 7 I/O
— No connect
D3 Connect to LatticeXP2 bank 7 I/O
— Connect to USB connectors through 33 Ohm resistor
— Connect to USB connectors through 33 Ohm resistor
— Connect to GND though a capacitor
15
LatticeXP2 Advanced
Evaluation Board User's Guide
Function
D10
GND
Description
Description
Description
LatticeXP2 I/O
D6
—