Epson S1R72V27, Руководство пользователя

Страница: 6 / 14

2. Jumper Settings
2 EPSON S1R72V27 Evaluation Board Manual
(Rev. 1.0)
2. Jumper Settings
Set the jumpers on the board as shown below. Settings marked “*” are default settings.
No. Details Setting (
*
indicates default)
CN2 +3.3 V supply to CPU board selection * 1-2 Su3.3 V (Note 1).
2-3 Does not 3.3 V
CN3 +5.0 V supply to CPU board selection * 1-2 Supplies +5.0 V.
2-3 Does not 5.0 V
JP3 CPU interface voltage setting
*
1-2 +3.3V (Note2)
1-3 +1.8V
JP8
～
JP12 * Short Normal setting S1R72V27 consumption current measuring jumper
(should normally be set to form a short-circuit)
Open Setting prohibited
JP15 Short CN5: For both device/host USB connector (CN5, CN6) function setting
(See section 3 for details.)
* Open CN5: Device, CN6: Host
JP16 USB host VBUS output 122 µF location selection * 1-2 VBUS switch IC output side
1-3 VBUS switch IC input side
JP17 * 1-2 MAX8586-ENRESET pin = High VBUS switch IC (MAX8586) auto-restart function
selection (See Maxim datasheet for details.)
1-3 MAX8586-ENRESET pin = Low
JP18 * Short With discharge resistor USB host VBUS output 122 µF capacitor discharge
resistor selection
Open Without discharge resistor
Note 1: Due to regulator limitations, avoid using this +3.3 V jumper during normal use.
Note 2: If the CPU I/F level is n1.8 V nor +3.3 V, but in between, leave both 1-2 and 1-3 open and apply the
voltage to pin 1.