參數(shù)資料
型號： TMP320C6205GHK200
廠商： Texas Instruments, Inc.
元件分類： 數(shù)字信號處理
英文描述： FIXED-POINT DIGITAL SIGNAL PROCESSOR
中文描述： 定點(diǎn)數(shù)字信號處理器
文件頁數(shù)： 63/72頁
文件大?。?/td> 1143K
代理商： TMP320C6205GHK200
SPRS106G OCTOBER 1999 REVISED JULY 2006
63
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
MULTICHANNEL BUFFERED SERIAL PORT TIMING (CONTINUED)
timing requirements for McBSP as SPI master or slave: CLKSTP = 11b, CLKXP = 1
(see Figure 38)
200
NO.
MASTER
MIN
SLAVE
MIN
UNIT
MAX
MAX
4
tsu(DRV-CKXL)
th(CKXL-DRV)
Setup time, DR valid before CLKX low
12
2 3P
ns
5
Hold time, DR valid after CLKX low
4
5 + 6P
ns
P = 1/CPU clock frequency in ns. For example, when running parts at 200 MHz, use P = 5 ns.
For all SPI slave modes, CLKG is programmed as 1/2 of the CPU clock by setting CLKSM = CLKGDV = 1.
switching characteristics over recommended operating conditions for McBSP as SPI master or
slave: CLKSTP = 11b, CLKXP = 1
(see Figure 38)
200
NO.
PARAMETER
MASTER§
SLAVE
UNIT
MIN
MAX
MIN
MAX
1
th(CKXH-FXL)
td(FXL-CKXL)
td(CKXH-DXV)
Hold time, FSX low after CLKX high
Delay time, FSX low to CLKX low#
H 2
H + 3
ns
2
T 2
T + 1
ns
3
Delay time, CLKX high to DX valid
2
4
3P + 4
5P + 17
ns
6
tdis(CKXH-DXHZ)
Disable time, DX high impedance following last data bit from
CLKX high
2
4
3P + 3
5P + 17
ns
7
td(FXL-DXV)
Delay time, FSX low to DX valid
L 2
L + 4
2P + 2
4P + 17
ns
P = 1/CPU clock frequency in ns. For example, when running parts at 200 MHz, use P = 5 ns.
For all SPI slave modes, CLKG is programmed as 1/2 of the CPU clock by setting CLKSM = CLKGDV = 1.
§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)
T =
CLKX period = (1 + CLKGDV) * S
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
FSRP = FSXP = 1. As a SPI master, FSX is inverted to provide active-low slave-enable output. As a slave, the active-low signal input on FSX
and FSR is inverted before being used internally.
CLKXM = FSXM = 1, CLKRM = FSRM = 0 for master McBSP
CLKXM = CLKRM = FSXM = FSRM = 0 for slave McBSP
#FSX should be low before the rising edge of clock to enable slave devices and then begin a SPI transfer at the rising edge of the master clock
(CLKX).
Bit 0
Bit(n-1)
(n-2)
(n-3)
(n-4)
Bit 0
Bit(n-1)
(n-2)
(n-3)
(n-4)
5
4
3
7
6
2
1
CLKX
FSX
DX
DR
Figure 38. McBSP Timing as SPI Master or Slave: CLKSTP = 11b, CLKXP = 1
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