Miscellaneous; Thermal Diode (Temperature Sensor); Debug Interfaces - Nvidia TEGRA DG-04927-001_V01 User Manual

4.9 Miscellaneous

4.9.1 Thermal Diode (Temperature Sensor)

Figure 23: Thermal Diode Connection Example
Table 13. Thermal Diode Pinout

4.9.2 Debug Interfaces

An optional debug connector providing access to several debugging interfaces can be added to a design, possibly in the early
stages and removed for production. One option is the Debug connector shown in Figure 24. This connector is used with the
E1137 Combo Debug Board. This board interfaces to the Tegra 200 Series Developer Board Debug connector (J10) using a
flex cable. The Combo board provides:
RS-232 interface on a DB-9 connector which uses UART1 on the Tegra 250
Standard 20-pin, 0.1" JTAG header
- Can be used with standard ARM software development/debugging hardware
- Provides low level access to the CPUs and AVP
Ethernet RJ-45 jack by means of a SPI-Ethernet controller (using the Tegra 250 SPI1 interface)
Note that in the circuit in Figure 24, there is an optional resistor on JTAG_TRST_N. For normal JTAG operation, this resistor
should not be present. The JTAG_TRST_N pin on the Tegra 250 selects whether the JTAG interface is to be used for
communicating with the Tegra 250 CPU complex, or for Test/Scan purposes. When JTAG_TRST_N is pulled low, the JTAG
interface is enabled for access to the CPU complex. When high, it is in Test/Scan mode.
When used in the normal operating mode to access the internal CPUs, in order to reset the Tegra 250 JTAG block, a reset
command is used rather than toggling the JTAG_TRST_N pin.
DG-04927-001_v01
Signal Pin
THERMD_N E6
THERMD_P F7
Advance Information – Subject to Change
NVIDIA CONFIDENTIAL
Tegra 200 Series Developer Board User Guide
35