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| 型號： | DSPCOMMANDUM |
| 英文描述： | Universal Command Converter for DSP User＇s Manual |
| 中文描述： | 通用命令轉(zhuǎn)換為數(shù)字信號處理器用戶手冊 |
| 文件頁數(shù)： | 45/70頁 |
| 文件大?。?/td> | 550K |
| 代理商： | DSPCOMMANDUM |
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JTAG/ONCE Interface Cable
Motorola
Host Computer Card and Command Converter Support Information
4-3
4.2 Host Computer Interface Cable
The 37-pin cable which connects to the host computer is called the host computer interface
cable. This cable provides the signals and power to the command converters.
4.3 JTAG/O
n
CE Interface Cable
The command converter 14-pin connector is connected to the target system through the
JTAG/OnCE interface cable. These signals provide the control signals to as many as 24
target DSPs or other JTAG devices.
Table 4-3. Host Computer Interface Cable
Pin #
Mnemonic
Signal Name and Description
1
INT_ACK
Host ack of ADM service request
2
ADM_GROUP
CC group control flag from Host
3
HOST_ACK
Host ack of ADM data transfer request
4
ADM_ALL
Host signal which selects all ADMs
5
ADM_RESET
Host signal which asserts CC(s) reset
6-8
ADM_SEL2,1,0
CC address select signals 2-0 for one of 8 CCs
9
HOST_REQ
Host signal which requests CC data
10
ADM_REQ
CC signal which requests Host data transfer
11
ADM_ACK
CC ack of Host data transfer request
12
ADM_INT
CC service request status signal to Host
13
HOST_BRK
CC service request signal to Host, (low true)
14
ADM_BRK
Host signal to interrupt CC(s)
15
BRACE_SEL
Brace56 Emulator select signal
16-19
PD1,3,5,7
HOST/CC data bus bits1, 3, 5, 7
20-25
GND
HOST/CC ground lines
26
NC
No Connect
27-29
+5v
+5 volts from the HOST
30
HOST_ENABLE
HOST signal which enables CC address logic
31-33
GND
HOST/CC ground lines
34-37
PD0,2,4,6
HOST/CC data bus bits 0, 2, 4, 6
Table 4-4. JTAG/OnCE Connector J2
Pin #
Signal
Signal Description
1
TDI/DSI
Target JTAG/OnCE Serial Input
2
GND
Ground
3
TDO/DSO
Target JTAG/OnCE Serial Output
4
GND
Ground
5
TCK/DSCK
Target JTAG/OnCE Serial Clock
6
GND
Ground
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