Texas Instruments C5535 DSPShield, Hardware Reference Manual

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C5535 DSPShield H/W Reference Manual Version 0.1
In Collaboration with Stanford University
page 6
2.2 Internal Voltages
There are a number of voltages that can be found on the DSPShield. They are derived
from various ICs and can be monitored at certain points. Table 3 lists the voltages, test
points and the devices/functions powered by the voltages.
Voltage Test Point Source Device/Functions
+5V TP8 External 1. LMR10510X DC-DC Regulator
2. ARD_INTF_VCC
3. ARD_5V (sourcing)
+3.3V TP9 LMR10510X DC-
DC Regulator (VR1)
1. C5535 USB_VDDOSC
2. C5535 USB_VDDA3P3
3. C5535 USB_VDDPLL
4. C5535 DVD_DRTC
5. C5535 LDOI
6. C5535 DVDDIO
7. All Muxes
8. SD Card
9. GPIO Expander 2
10. AIC3204 IOVDD
11. ARD_INTF_VCC
12. ARD_3.3V (sourcing)
13. DSP Expansion 3.3V
14. Em3.3V
+1.8V TP5, TP6 Internal AIC3204
LDO 1. AIC3204 AVDD, TP5
2. AIC3204 DVDD, TP6
+1.3V TP10 LP3982 LDO (VR2) 1. C5535 CVDDRTC
2. C5535 CVDD (0 OHM resistor mux
selectable)
3. GPAIN CLAMP DIODES
+1.3V
(C5535)
Pin 1 of C19
Or TP3
C5535 DSP_LDOO 1. C5535 CVDD (0 OHM resistor mux
selectable. DEFAULT configuration)
+1.3V
(C5535)
Pin 1 of C45 C5535 USB_LDOO 1. C5535 USB_VDDA1P3
2. C5535 USB_VDD1P3
+1.3V
(C5535)
Pin 1 of C53 C5535 ANA_LDOO 1. C5535 VDDA_ANA
2. C5535 VDDA_PLL
+1.8V
(FT2232H)
Pin 1 of C125 FTDI FT2232H
VREGOUT
1. FT2232H VCORE
+7.3V Pint 1 of C70 Internal OLED DC-
DC regulator
1. OLED Display
GND TP11 - 1. Digital Ground
AGND0 TP7 - 1. AIC3204 Analog Ground
Table 3. DSPShield Voltages and Grounds
2.3 Voltage Monitoring
The output voltages of the LMR10510X DC-DC (+3.3V) regulator and the LP3982
(+1.3V) LDO regulator are monitored by a TPS386596L33 Quad Reset Supervisory IC.