Schematics
UM10
15
3
0
/3
8
D
oc
ID
1
8124
R
e
v
1
Figure 13.
Schematic revision history
4
4
3
3
2
2
1
1
4
4
3
3
2
2
1
1
Spear300
CPU Board
2.3
Release note
8
8
20 Oct 2009
Revision History
Revision Descriptions
Date
1.0
NOTE:
Initial release
20 May 2009
1.1
C78, C79 : connected to GND instead of 2.5V
28 May 2009
Add signal nRESET to daughter-board connectors (pinout to be defined)
Add three optionals USBLC6 (U13, U14, U15) for ESD protection
Add optional STBP120B (U16) for overvoltage protection
Add two Spare Resistor for RTC Power (R76, R77)
Add four 3.2mm mechanical holes
Add two GND pins on 32.768Khz oscillator for PCB footprint
Changed daughter-board connectors (Tyco MICTOR instead Samtec QTH)
Made some cosmetic changes
Changed daughter-board connectors ( Samtec MIS instead Tyco MICTOR)
1.2
10 June 2009
1.3
Add four 47uF capacitor (C94, C95, C96, C97)
25 June 2009
1.4
Remove UART Solution 1 at Page 7
Remove JTAG alternativ Optional part at Page 4
Add a 10uF capacitor at input pot of STBP120, C98
Add two net: RS232_RXD and RS232_TXD at Page 7 U12-pin 14 and U12-pin13,
these two net are connected to Pin40 and Pin42 of J13, Remove Test Point TP3 and TP4
Change footprint of D4(TS420-B), from DO-214AC to DPAK
Add C99 0.1uF,0402 capacitor to Spear300 VREF pin
Add R78 0ohm resistor to Pin17 of J3 JTAG Port, and another pad be connected to GND
Add R79 0ohm resistor to Pin19 of J3 JTAG Port, and another pad be connected to GND
03 July 2009
Add GND to C94, C95,C96,C97
1.5
FB8 is only connected to PIN 6 of J1 at Page3
Add a FB16, FB16 is connected to PIN 5 of J1 at Page3
FB9 is connected to PIN 9 and PIN 11 of J2 at Page3
FB10 is connected to PIN 10 and PIN 12 of J2 at Page3
03 July 2009
1.5.1
Swap U2 and U3 data signals for better pcb routing at Page2
Swap Socket J12 and J13 signals and add four 1.8V power pins to J12 at Page7
R11~R21 pull up to 3.3V (change from 3.3V_SP)at Page4
D3 Pin.A1 connect to 3.3V (change from 3.3V_SP)at Page4
10 July 2009
1.6
Change all "Motherboard" to "CPU Board"
Apdate Fiducial (REF*) symbol.
17 July 2009
1.7
Pull down U10.4 CSNS to AGND
21 July 2009
Connect U10.39 SET_PH1 to AGND
1.8
Change U13.5 net to USB_DEV_5V, Add C102 to Vbus pin
Change U14.5 net to HOST0_5V, Add C101 to Vbus pin
Change U15.5 net to HOST1_5V, Add C100 to Vbus pin
Modify USB ESD circuit design, insert ESD IC into USB signals: DM and DP,
include USB DEV and Two USB Host
23 July 2009
1.9
Pull up R61 to 1.2V
Change RS232-TXD net to J17.5 pin
Change RS232-RXD net to J17.3 pin
Change R72,R73,R74 value to 1K ohm
Change R41 value to 680 ohm
Change R75 value to 330 ohm
10 Sep 2009
Revision History
Revision Descriptions
Date
2.0
Change R49 Value to 56K ohm
23 Sep 2009
2.1
Add TP30 for DQS1 test; Add J22 for serial cable jumper ; Use NC for no pop components
16 Oct 2009
2.2
Change R8 and R9 to "470 ohm" (remove NC), and R51 and R52 to "0 ohm,NC"
20 Oct 2009
2.3
20 Oct 2009
Made some cosmetic changes
Rev
Date:
Sheet
of
Board
Title
Code
Project
Rev
Date:
Sheet
of
Board
Title
Code
Project
Rev
Date:
Sheet
of
Board
Title
Code
Project
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
