DIY编程器网

标题: TIAO USB Multi Protocol Adapter [打印本页]

作者: liyf 时间: 2013-10-13 08:54
标题: TIAO USB Multi Protocol Adapter
也是用ft2232实现的，把jtag，spi，i2c，com等功能全部集成了，而且有电平转换，com口输出ttl和cmos电平
可惜没有电路图，不过看文字说明该大概明白电路了，基本就是标准电路实现
找到原理图在补充吧
cmos电平转换用的是max3243，jtag电平用74LVC16T245

Pin Connections

FT2232H	20 PIN JTAG Header	SPI Header 1	DB9 Connector	RS232 Level Output Header	TTL Level Output Header	SPI Header 2	Memo
ADBUS0	TCK	SCK
ADBUS1	TDI	MOSI
ADBUS2	TDO	MISO
ADBUS3	TMS	CS
ADBUS4	RST
ADBUS5	nTRST
ADBUS6	DBGRQ
ADBUS7	RTCK

ACBUS0	DBGACK
ACBUS1							Connected to nTRST pin of JTAG Header, (input)
ACBUS2							Connected to RST pin of JTAG Header, as (input)
ACBUS3							OEN Pin (enable buffer chip), active low (output)
ACBUS4							Target present pin. Detect VTAR, active low (input)
ACBUS5
ACBUS6
ACBUS7

BDBUS0			TX	TX	TX	SCK
BDBUS1			RX	RX	RX	MOSI
BDBUS2			RTS	RTS	RTS	MISO
BDBUS3			CTS	CTS	CTS	CS
BDBUS4			DTR	DTR	DTR
BDBUS5			DSR	DSR	DSR
BDBUS6			DCD	DCD	DCD
BDBUS7			RI	RI	RI

BCBUS0
BCBUS1
BCBUS2
BCBUS3							RX LED
BCBUS4							TX LED
BCBUS5
BCBUS6
BCBUS7

PWREN							Enable MAX3243. Active low (output)