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TMS320C6202
FIXED-POINT DIGITAL SIGNAL PROCESSOR
SPRS072B – AUGUST 1998 – REVISED AUGUST 1999
60
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443
MULTICHANNEL BUFFERED SERIAL PORT TIMING (CONTINUED)
switching characteristics for McBSP
†‡
(see Figure 40)
NO. PARAMETER
’C6202-200
’C6202-233
’C6202-250
UNIT
MIN MAX
1 t
d(CKSH-CKRXH)
Delay time, CLKS high to CLKR/X high for internal
CLKR/X generated from CLKS input
4 10 ns
2 t
c(CKRX)
Cycle time, CLKR/X CLKR/X int 2P
§
ns
3 t
w(CKRX)
Pulse duration, CLKR/X high or CLKR/X low CLKR/X int C – 1
¶
C + 1
¶
ns
4 t
d(CKRH-FRV)
Delay time, CLKR high to internal FSR valid CLKR int –2 3 ns
9
t
d(CKXH FXV)
Delay time CLKX high to internal FSX valid
CLKX int –2 3
ns
9
t
d(CKXH-FXV)
Dela
y
time
,
CLKX
high
to
internal
FSX
v
alid
CLKX ext 3 9
ns
12
t
di (CKXH DXHZ)
Disable time, DX high impedance following last data bit
CLKX int –1 4
ns
12
t
dis(CKXH-DXHZ)
,g g
from CLKX high
CLKX ext
3 9
ns
13
t
d(CKXH DXV)
Delay time CLKX high to DX valid
CLKX int –1 4
ns
13
t
d(CKXH-DXV)
Dela
y
time
,
CLKX
high
to
DX
v
alid
CLKX ext 3 9
ns
14
t
d(FXH DXV)
Delay time, FSX high to DX valid
FSX int –1 3
ns
14
t
d(FXH-DXV)
ONLY applies when in data delay 0 (XDATDLY = 00b)
mode.
FSX ext 3 9
ns
†
CLKRP = CLKXP = FSRP = FSXP = 0. If polarity of any of the signals is inverted, then the timing references of that signal are also inverted.
‡
Minimum delay times also represent minimum output hold times.
§
P = 1/CPU clock frequency in ns. For example, when running parts at 250 MHz, use P = 4 ns.
¶
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
ADVANCE INFORMATION