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ubb-jtag/ubb-jtag-m1.sch: connect VREF to 2.5 V; explain that R3 is untested

This commit is contained in:
Werner Almesberger 2013-01-04 15:57:12 -03:00
parent b6a9e234b1
commit a58e78910e
1 changed files with 21 additions and 8 deletions
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29
ubb-jtag/ubb-jtag-m1.sch
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@ -1,8 +1,9 @@
EESchema Schematic File Version 2 date Fri Jan 4 15:09:41 2013
EESchema Schematic File Version 2 date Fri Jan 4 15:57:06 2013
LIBS:pwr
LIBS:r
LIBS:8_10-card
LIBS:conn
LIBS:ubb-jtag-m1-cache
EELAYER 25 0
EELAYER END
$Descr A4 11693 8268
@ -124,7 +125,6 @@ F 1 "680" V 6000 4250 50 0000 C CNN
1 6000 4250
-1 0 0 1
$EndComp
NoConn ~ 4300 3100
Text Label 7400 3000 0 60 ~ 0
DAT2
Text Label 7400 3300 0 60 ~ 0
@ -141,6 +141,21 @@ Text Notes 7050 5300 0 60 ~ 0
680
Text Notes 6950 5400 0 60 ~ 0
220+680
Text Notes 7400 5350 0 60 ~ 0
= 2.49 V
Text Notes 5900 5200 0 60 ~ 0
Voltage dividers:
Text Notes 3050 4050 0 60 ~ 0
Milkymist One
$Comp
L 2V5 #PWR02
U 1 1 50E725D8
P 4300 2600
F 0 "#PWR02" H 4300 2560 30 0001 C CNN
F 1 "2V5" H 4300 2750 60 0000 C CNN
1 4300 2600
1 0 0 -1
$EndComp
Wire Wire Line
8200 3100 7800 3100
Wire Wire Line
@ -234,10 +249,8 @@ Wire Wire Line
Connection ~ 6300 4700
Wire Notes Line
6950 5300 7350 5300
Text Notes 7400 5350 0 60 ~ 0
= 2.49 V
Text Notes 5900 5200 0 60 ~ 0
Voltage dividers:
Text Notes 3050 4050 0 60 ~ 0
Milkymist One
Wire Wire Line
4300 2600 4300 3100
Text Notes 5700 5700 0 60 ~ 0
R3 is absent in the proof of concept implementation and thus untested.
$EndSCHEMATC