SMJ320C80 Datasheet, PDF (149/157 Pages) Texas Instruments – DIGITAL SIGNAL PROCESSOR

emulator-interface connection (continued)
3.3 V
SMJ320C80
DIGITAL SIGNAL PROCESSOR
SGUS025A – AUGUST 1998 – REVISED JUNE 2002
3.3 V
3.3 V
T34
EMU0
J35
EMU1
L33
TRST
N33
TMS
H34
TDI
P32
TDO
E35
TCK
’C80
6 in. or less
3.3 V
13
5
EMU0
PD
14
EMU1
2
4
TRST
1
GND
6
TMS
3
GND
8
TDI
7
GND
10
TDO
11
GND
12
TCK
9
GND
TCKRET
Emulator
Header
T34
EMU0
J35
EMU1
L33
TRST
N33
TMS
H34
TDI
P32
TDO
E35
TCK
’C80
More than 6 in.
3.3 V
13
5
EMU0
PD
14
EMU1
2
4
TRST
1
GND
6
TMS
3
GND
8
TDI
7
GND
10
TDO
11
GND
12
TCK
9
GND
TCKRET
Emulator
Header
Figure 125. Emulation Header Connections – Emulator-Driven Test Clock
The target system also can generate the test clock. This allows the user to:
D Set the test clock frequency to match the system requirements. (The emulator provides only a 10-MHz
test clock.)
D Have other devices in the system that require a test clock when the emulator is not connected
3.3 V
3.3 V
T34
EMU0
J35
EMU1
L33
TRST
N33
TMS
H34
TDI
P32
TDO
E35
TCK
’C80
System
Test
Clock
More than 6 in.
3.3 V
13
5
EMU0
PD
14
EMU1
2
4
TRST GND
1
6
TMS
GND
3
8
TDI
GND
7
10
TDO
GND
11
12
TCK
GND
9
TCKRET
Emulator
Header
Figure 126. Emulation Header Connections – System-Driven Test Clock
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149