Texas Instruments SM320F2812-HT specifications McBSP Switching Characteristics1 2, Dxena =

SM320F2812-HT

www.ti.com				SGUS062A –JUNE 2009 –REVISED APRIL 2010
		Table 6-53. McBSP Switching Characteristics(1) (2) (3)
NO.		PARAMETER			MIN	MAX	UNIT
M1	tc(CKRX)	Cycle time, CLKR/X		CLKR/X int	2P		ns
M2	t	Pulse duration, CLKR/X high		CLKR/X int	D – 5(4)	D + 5(4)	ns
	w(CKRXH)
M3	t	Pulse duration, CLKR/X low		CLKR/X int	C – 5(4)	C + 5(4)	ns
	w(CKRXL)
M4	td(CKRH-FRV)	Delay time, CLKR high to internal FSR valid		CLKR int	0	4	ns
				CLKR ext	3	27
M5	td(CKXH-FXV)	Delay time, CLKX high to internal FSX valid		CLKX int	0	4	ns
				CLKX ext	3	27
M6	tdis(CKXH-DXHZ)	Disable time, CLKX high to DX high impedance following last		CLKX int		8	ns
		data bit		CLKX ext		14
		Delay time, CLKX high to DX valid.		CLKX int		9
		This applies to all bits except the first bit transmitted.		CLKX ext		28
M7	td(CKXH-DXV)	Delay time, CLKX high to DX valid	DXENA = 0	CLKX int		8	ns
				CLKX ext		14
		Only applies to first bit transmitted when in Data	DXENA = 1	CLKX int		P + 8
				CLKX ext		P + 14
		Delay 1 or 2 (XDATDLY= 01b or 10b) modes
		Enable time, CLKX high to DX driven	DXENA = 0	CLKX int	0
M8	ten(CKXH-DX)			CLKX ext	6		ns
		Only applies to first bit transmitted when in Data	DXENA = 1	CLKX int	P
				CLKX ext	P + 6
		Delay 1 or 2 (XDATDLY= 01b or 10b) modes
		Delay time, FSX high to DX valid	DXENA = 0	FSX int		8
M9	td(FXH-DXV)			FSX ext		14	ns
		Only applies to first bit transmitted when in Data	DXENA = 1	FSX int		P + 8
				FSX ext		P + 14
		Delay 0 (XDATDLY= 00b) mode.
		Enable time, FSX high to DX driven	DXENA = 0	FSX int	0
M10	ten(FXH-DX)			FSX ext	6		ns
		Only applies to first bit transmitted when in Data	DXENA = 1	FSX int	P
				FSX ext	P + 6
		Delay 0 (XDATDLY= 00b) mode

(1)Polarity bits CLKRP = CLKXP = FSRP = FSXP = 0. If the polarity of any of the signals is inverted, then the timing references of that signal are also inverted.

(2)2P = 1/CLKG in ns

(3)Not production tested.

(4)C = CLKRX low pulse width = P D = CLKRX high pulse width = P

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