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JTAG接口

Watrt7年前 (2019-04-20)硬件接口28540

JTAG Pinouts

10-pin JTAG/SWD

Name	Pin	Pin	Name
Vref	1	2	SWDIO/TMS
GND	3	4	SWDCLK/TCLK
GND	5	6	SWO/TDO
-	7	8	NC/TDI
GNDDetect	9	10	nRESET

ARM-20 JTAG

Name	Pin	Pin	Name
VREF	1	2	VSUPPLY
nTRST	3	4	GND
TDI	5	6	GND
TMS	7	8	GND
TCK	9	10	GND
RTCK	11	12	GND
TDO	13	14	GND
nSRST	15	16	GND
DBGRQ	17	18	GND
DGBACK	19	20	GND

ARM-14 JTAG

Name	Pin	Pin	Name
VREF	1	2	GND
nTRST	3	4	GND
TDI	5	6	GND
TMS	7	8	GND
TCK	9	10	GND
TDO	11	12	nSRST
VREF	13	14	GND

MIPS EJTAG

Name	Pin	Pin	Name
nTRST	1	2	GND
TDI	3	4	GND
TDO	5	6	GND
TMS	7	8	GND
TCK	9	10	GND
nSRST	11	12
DINT	13	14	VREF

AVR JTAG

Name	Pin	Pin	Name
TCK	1	2	GND
TDO	3	4	VREF
TMS	5	6	nSRST
-	7	8	nTRST
TDI	9	10	GND

Maxim MAXQ JTAG

Name	Pin	Pin	Name
TCK	1	2	GND
TDO	3	4	VREF
TMS	5	6	nSRST
-	7	8	VSUPPLY
TDI	9	10	GND

Texas Instruments MSP430 JTAG

Name	Pin	Pin	Name
TDO	1	2	VREF
TDI	3	4	-
TMS	5	6	TCLK
TCK	7	8	VPP
GND	9	10	-
nSRST	11	12	-
-	13	14	-

Note: There are usually different way to connect JTAG header to the target. Always check the datasheet.

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