参数资料
型号: TMS320C542PGE-40
厂商: TEXAS INSTRUMENTS INC
元件分类: 数字信号处理
英文描述: 16-BIT, 100 MHz, OTHER DSP, PQFP144
封装: PLASTIC, QFP-144
文件页数: 105/111页
文件大小: 1467K
代理商: TMS320C542PGE-40
TMS320C54x, TMS320LC54x, TMS320VC54x
FIXED-POINT DIGITAL SIGNAL PROCESSORS
SPRS039C – FEBRUARY 1996 – REVISED DECEMBER 1999
93
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
buffered serial port receive timing
timing requirements for buffered serial port receive (see Figure 35)
’C54x-40
’LC54x-40
’54x-50
’54x-66
UNIT
MIN
MAX
MIN
MAX
UNIT
tc(SCK)
Cycle time, serial port clock
25
20
ns
tf(SCK)
Fall time, serial port clock
4
ns
tr(SCK)
Rise time, serial port clock
4
ns
tw(SCK)
Pulse duration, serial port clock low/high
8.5
6
ns
tsu(BFSR)
Setup time, BFSR before BCLKR falling edge (see Note 2)
2
ns
th(BFSR)
Hold time, BFSR after BCLKR falling edge (see Note 2)
10
tc(SCK)–2
10
tc(SCK)–2
ns
tsu(BDR)
Setup time, BDR before BCLKR falling edge
0
ns
th(BDR)
Hold time, BDR after BCLKR falling edge
10
ns
The serial port design is fully static and therefore can operate with tc(SCK) approaching infinity. It is characterized approaching an input frequency
of 0 Hz but tested at a much higher frequency to minimize test time.
First bit is read when BFSR is sampled low by BCLKR clock.
NOTE 2: Timings for BCLKR and BFSR are given with polarity bits (BCLKP and BFSP) set to 0.
tw(SCK)
BCLKR
BFSR
BDR
1
2
8/10/12/16
tsu(BDR)
tc(SCK)
tsu(BFSR)
th(BFSR)
th(BDR)
tr(SCK)
tf(SCK)
Figure 35. Buffered Serial Port Receive Timing
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