![background image](http://html1.mh-extra.com/html/texas-instruments/tms320c28x/tms320c28x_reference-manual_1097071557.webp)
Debug Interface
7-4
Table 7
−
1. 14-Pin Header Signal Descriptions
Signal
Description
Emulator
State
†
Target
State
†
EMU0
Emulation pin 0
I
I/O
EMU1
Emulation pin 1
I
I/O
GND
Ground
PD (V
CC
)
Presence detect. Indicates that the emulation
cable is connected and that the target is pow-
ered up. PD should be tied to V
CC
in the target
system.
I
O
TCK
Test clock. TCK is a clock source from the
emulation cable pod. This signal can be used
to drive the system test clock.
O
I
TCK_RET Test clock return. Test clock input to the emu-
lator. Can be a buffered or unbuffered version
of TCK.
I
O
TDI
Test data input
O
I
TDO
Test data output
I
O
TMS
Test mode select
O
I
TRST
‡
Test reset
O
I
†
I = input; O = output
‡
Do not use pullup resistors on TRST: it has an internal pulldown device. In a low-noise
environment, TRST can be left floating. In a high-noise environment, an additional pulldown
resistor may be needed. (The size of this resistor should be based on electrical current
considerations.)
The state of the TRST, EMU0, and EMU1 signals at device power up deter-
mine the operating mode of the device. The operating mode takes effect as
soon as the device has sufficient power to operate. Should the TRST signal
rise, the EMU0 and EMU1 signals are sampled on its rising edge and the\at
operating mode is latched. Some of these modes are reserved for test pur-
poses, but those that can be of use in a target system are detailed in Table 7
A target system is not required to support any mode other than normal mode.
Summary of Contents for TMS320C28x
Page 30: ...1 12...
Page 80: ...This page intentionally left blank 2 50 This page intentionally left blank...
Page 269: ...IN loc16 PA 6 112 MOV AL 0 AL 0 UOUT IORegC AL IOspace IORegC AL 10...
Page 308: ...MAXCUL P loc32 6 151 Saturate MOVL Var64 2 ACC Store result into Var64 MOVL Var64 P...
Page 509: ...SUBL ACC P PM 6 352 SUBL ACC P PM ACC S B 11 M X 4 MOVH Y ACC 5 Store Q15 result into Y...
Page 585: ...This page intentionally left blank 7 32 This page intentionally left blank...