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參數資料
| 型號： | TMX320C6204GGP167 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | E Core |
| 中文描述： | 定點數字信號處理器 |
| 文件頁數： | 68/83頁 |
| 文件大小： | 1176K |
| 代理商： | TMX320C6204GGP167 |
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TMS320C6211, TMS320C6211B
FIXED-POINT DIGITAL SIGNAL PROCESSORS
SPRS073K
AUGUST 1998
REVISED MARCH 2004
68
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251
1443
MULTICHANNEL BUFFERED SERIAL PORT TIMING (CONTINUED)
switching characteristics over recommended operating conditions for McBSP
(see Figure 37)
NO.
PARAMETER
150
167
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
26
ns
2
3
4
t
c(CKRX)
t
w(CKRX)
d(CKRH-FRV)
Cycle time, CLKR/X
Pulse duration, CLKR/X high or CLKR/X low
Delay time, CLKR high to internal FSR valid
CLKR/X int
CLKR/X int
CLKR int
CLKX int
CLKX ext
CLKX int
CLKX ext
CLKX int
CLKX ext
2P
§
C
1
#
11
11
ns
ns
ns
C + 1
#
3
3
9
4
9
9
t
d(CKXH-FXV)
Delay time CLKX high to internal FSX valid
Delay time, CLKX high to internal FSX valid
ns
3
12
t
dis(CKXH-DXHZ)
Disable time, DX high impedance following last data bit
from CLKX high
9
3
ns
13
t
d(CKXH-DXV)
Delay time CLKX high to DX valid
Delay time, CLKX high to DX valid
9+ D1
||
3 + D1
||
4 + D2
||
19 + D2
||
ns
14
t
d(FXH-DXV)
Delay time, FSX high to DX valid
FSX int
1
3
ns
ONLY applies when in data
delay 0 (XDATDLY = 00b) mode
FSX ext
3
9
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 167 MHz, use P = 6 ns.
The minimum CLKR/X period is twice the CPU cycle time (2P). This means that the maximum bit rate for communications between the McBSP
and other device is 83 Mbps for 167 MHz CPU clock or 75 Mbps for 150 MHz CPU clock; where the McBSP is either the master or the slave.
Care must be taken to ensure that the AC timings specified in this data sheet are met. The maximum bit rate for McBSP-to-McBSP
communications is 33 Mbps; therefore, the minimum CLKR/X clock cycle is either twice the CPU cycle time (2P), or 30 ns (33 MHz), whichever
value is larger. For example, when running parts at 167 MHz (P = 6 ns), use 30 ns as the minimum CLKR/X clock cycle (by setting the appropriate
CLKGDV ratio or external clock source). When running parts at 60 MHz (P = 16.67 ns), use 2P = 33 ns (30 MHz) as the minimum CLKR/X clock
cycle. The maximum bit rate for McBSP-to-McBSP communications applies when the serial port is a master of the clock and frame syncs (with
CLKR connected to CLKX, FSR connected to FSX, CLKXM = FSXM = 1, and CLKRM = FSRM = 0) in data delay 1 or 2 mode (R/XDATDLY =
01b or 10b) and the other device the McBSP communicates to is a slave.
#
C =
H or L
S =
sample rate generator input clock = 2P 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
CLKGDV should be set appropriately to ensure the McBSP bit rate does not exceed the maximum limit (see footnote above).
||
Extra delay from CLKX high to DX valid applies
only
to the first data bit of a device, if and only if DXENA = 1 in SPCR.
If DXENA = 0, then D1 = D2 = 0
If DXENA = 1, then D1 = 2P, D2 = 4P
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