参数资料
型号: SM320C2550GBM
厂商: TEXAS INSTRUMENTS INC
元件分类: 数字信号处理
英文描述: 16-BIT, 50 MHz, OTHER DSP, CPGA68
封装: CERAMIC, MO-067AA, MO-066AA, PGA-68
文件页数: 15/40页
文件大小: 681K
代理商: SM320C2550GBM
SMJ320C25, SMJ320C2550
DIGITAL SIGNAL PROCESSOR
SGUS007D – AUGUST 1988 – REVISED OCTOBER 2001
22
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
serial port timing
switching characteristics over recommended operating conditions (see Note 1)
PARAMETER
SMJ320C25-50
SMJ320C25
UNIT
PARAMETER
MIN
MAX
MIN
MAX
UNIT
td(CH-DX)
Delay time, DX valid after CLKX rising edge (see Note 8)
75
80
ns
td(FL-DX)
Delay time, DX valid after FSX falling edge (TXM = 0. see Note 8)
40
45
ns
td(CH-FS)
FSX valid after CLKX rising edge (TXM = 1 )
40
45
ns
timing requirements over recommended operating conditions (see Note 1)
SMJ320C25-50
SMJ320C25
UNIT
MIN
MAX
MIN
MAX
UNIT
fsx
Serial port frequency
1.25
6250
1.25
5000
kHz
tc(SCK)
Serial port clock (CLKX/CLKR) cycle time
160
800 000
200
800 000
ns
tw(SCK1
Serial port clock (CLKX/CLKR) low pulse duration (see Note 9)
64
80
ns
tw(SCK)
Serial port clock (CLKX/CLKR) high pulse duration (see Note 9)
64
80
ns
tsu(FS)
FSX/FSR setup time before CLKX/CLKR falling edge (TXM = 0)
5
18
ns
th(FS)
FSX/FSR hold time after CLKX/CLKR falling edge (TXM = 0)
10
20
ns
tsu(DR)
OR setup time before CLKR falling edge
5
10
ns
th(DR)
OR hold time after CLKR falling edge
10
20
ns
NOTES:
1: Q = 1/4tc(C)
8. The last occurrence of FSX falling and CLKX rising.
9. The duty cycle of the serial port clock must be within 40–60% .Serial port clock (CLKX/CLKR) rise and fall times must be less than
25 ns.
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