Configuration
—Motherboard
MPC5777C EVB User Guide, Rev. 0
13
Freescale
Table 5: Ethernet control jumpers
Jumpe
r
Description
J22
PHY power(3.3V_SR) on (jumper
placed on default)
J18
RXCLK
J20
CRS_LEDCFG
J24
RXER_MDIXEN
J26
RXDV_MIIMODE
J39
RXD0_PHYAD1
J40
RXD1_PHYAD1
J41
RXD2_PHYAD2
J42
RXD3_PHYAD3
J44
COL_PHYAD0
J45
TXEN
J46
TXCLK
J47
TXD0
J48
TXD1
J49
TXD2
J50
TXD3_SNIMODE
J51
MDC
J52
MDIO
3.6
User Area
There is a rectangular prototype area on the EVB top right corner, consisting of a 0.1in. pitch array of
through-hole plated pads. Power from all the three switching regulators is readily accessible along
with GND through JP1 – JP16 next to the prototyping area. This area is ideal for the addition of any
custom circuitry.
There are four active low user LEDs D2, D3, D4 and D5, these are driven by connecting a logic 0
signal to the corresponding pin on 0.1in. header P7 (USER LEDS). The LED inputs are pulled to
VDD_HV_IO_MAIN through 10 k
resistors.
There are 4 active high pushbutton switches SW1, SW2, SW3 and SW4 which will drive 5V onto the
respective pins on 0.1in. Connector P6 when pressed. The switch outputs are pulled to GND via 10
k
.
Potentiometer RV1 can be connected to port pin PB[0] via J53 and is adjustable between GND and 5 V
from the linear regulator. Power from all regulators can be connected to port pins as through J54:
• 1-2: 1.25V_SR to PB[1]
• 3-4: 3.3V_SR to PB[2]
• 5-6: 5.0V_SR_SR to PB[3]
• 7-8: 5V_LR to PB[4]
The P12V rail from the 12 V input is scaled to 4.3V through the voltage divider of R81 and R82 and
the scaled voltage can be connected to PB[5] via J55.