SMJ320C6701-SP Datasheet, PDF (49/60 Pages) Texas Instruments – RAD-TOLERANT CLASS-V FLOATING-POINT DIGITAL SIGNAL PROCESSOR

SMJ320C6701-SP
www.ti.com ............................................................................................................................................................ SGUS030E – APRIL 2000 – REVISED JULY 2009
Switching Characteristics for McBSP^(1)(2)(3)
(see Figure 31)
NO.
1
2
3
4
9
t_{d(CKSH–CKRXH)}
t_c(CKRX)
t_w(CKRX)
t_{d(CKRH–FRV)}
t_{d(CKXH–FXV)}
12
t_{dis(CKXH–DXHZ)}
13
t_{d(CKXH–DXV)}
14
t_{d(FXH–DXV)}
PARAMETER
Delay time, CLKS high to CLKR/X high for internal
CLKR/X generated from CLKS input
Cycle time, CLKR/X
CLKR/X
int
Pulse duration, CLKR/X high or CLKR/X low
CLKR/X
int
Delay time, CLKR high to internal FSR valid
CLKR int
Delay time, CLKX high to internal FSX valid
CLKX int
CLKX ext
Disable time, DX high impedance following last data bit ^{CLKX int}
from CLKX high
CLKX ext
Delay time, CLKX high to DX valid.
CLKX int
CLKX ext
Delay time, FSX high to DX valid.
FSX int
ONLY applies when in data delay 0 (XDATDLY = 00b)
mode.
FSX ext
MIN
3
MAX
15
UNIT
ns
2P
ns
C – 1 ⁽⁴⁾
C + 1⁽⁴⁾
ns
–4
–4
3 ⁽⁵⁾
–3 ⁽⁵⁾
2 ⁽⁵⁾
–2
3
–2 ⁽⁵⁾
2 ⁽⁵⁾
4
ns
5
16 ⁽⁵⁾
ns
2 ⁽⁵⁾
9 ⁽⁵⁾
ns
4
ns
16
4 ⁽⁵⁾
10 ⁽⁵⁾
ns
(1) CLKRP = CLKXP = FSRP = FSXP = 0 in the pin control register (PCR). If polarity of any of the signals is inverted, then the timing
references of that signal are also inverted.
(2) Minimum delay times also represent minimum output hold times.
(3) P = 1/CPU clock frequency in ns. For example, when running parts at 140 MHz, use P = 7 ns.
(4) C = H or L
S = sample rate generator input clock = P if CLKSM = 1 (P = 1/CPU clock frequency)
= sample rate generator input clock = P_clks if CLKSM = 0 (P_clks = CLKS period)
H = CLKX high pulse width = (CLKGDV/2 + 1) * S if CLKGDV is even
= (CLKGDV + 1)/2 * S if CLKGDV is odd or zero
L = CLKX low pulse width = (CLKGDV/2) * S if CLKGDV is even
= (CLKGDV + 1)/2 * S if CLKGDV is odd or zero
(5) This parameter is not tested.
Copyright © 2000–2009, Texas Instruments Incorporated
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