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DSP56857E 数据表(PDF) 40 Page - Freescale Semiconductor, Inc |
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DSP56857E 数据表(HTML) 40 Page - Freescale Semiconductor, Inc |
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40 / 53 page  56857 Technical Data, Rev. 6 40 Freescale Semiconductor Delay from SC0 high to SC1 (bl) high - Slave5 tRFSBHS -1 — 29 ns Delay from SC0 high to SC1 (wl) high - Slave5 tRFSWHS -1 — 29 ns Delay from SCK high to SC2 (bl) low - Slave5 tTFSBLS -29 — 29 ns Delay from SCK high to SC2 (wl) low - Slave5 tTFSWLS -29 — 29 ns Delay from SC0 high to SC1 (bl) low - Slave5 tRFSBLS -29 — 29 ns Delay from SC0 high to SC1 (wl) low - Slave5 tRFSWLS -29 — 29 ns SCK high to STD enable from high impedance - Slave tTXES —— 15 ns SCK high to STD valid - Slave tTXVS 4— 15 ns SC2 high to STD enable from high impedance (first bit) - Slave tFTXES 4— 15 ns SC2 high to STD valid (first bit) - Slave tFTXVS 4— 15 ns SCK high to STD not valid - Slave tTXNVS 4— 15 ns SCK high to STD high impedance - Slave tTXHIS 4— 15 ns SRD Setup time before SC0 low - Slave tSS 4— — ns SRD Hold time after SC0 low - Slave tHS 4— — ns Synchronous Operation (in addition to standard external clock parameters) SRD Setup time before SCK low - Slave tTSS 4— — ns SRD Hold time after SCK low - Slave tTHS 4— — ns 1. Slave mode is externally generated clocks and frame syncs 2. Max clock frequency is IP_clk/4 = 60MHz / 4 = 15MHz for a 120MHz part. 3. All the timings for the ESSI are given for a non-inverted serial clock polarity (TSCKP=0 in SCR2 and RSCKP=0 in SCSR) and a non-inverted frame sync (TFSI=0 in SCR2 and RFSI=0 in SCSR). If the polarity of the clock and/or the frame sync have been inverted, all the timings remain valid by inverting the clock signal SCK/SC0 and/or the frame sync SC2/SC1 in the tables and in the figures. 4. 50 percent duty cycle 5. bl = bit length; wl = word length Table 4-12 ESSI Slave Mode1 Switching Characteristics (Continued) Operating Conditions: VSS = VSSIO = VSSA = 0 V, VDD = 1.62-1.98V, VDDIO = VDDA = 3.0–3.6V, TA = –40° to +120°C, CL ≤ 50pF, fop = 120MHz Parameter Symbol Min Typ Max Units |
类似零件编号 - DSP56857E |
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类似说明 - DSP56857E |
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