Table 4-10 ESSI Mast" />
參數(shù)資料
型號: DSP56855BUE
廠商: Freescale Semiconductor
文件頁數(shù): 30/52頁
文件大?。?/td> 0K
描述: IC DSP 16BIT 120MHZ 100-LQFP
標(biāo)準(zhǔn)包裝: 90
系列: 568xx
核心處理器: 56800E
芯體尺寸: 16-位
速度: 120MHz
連通性: EBI/EMI,SCI,SSI
外圍設(shè)備: DMA,POR,WDT
輸入/輸出數(shù): 18
程序存儲器容量: 48KB(24K x 16)
程序存儲器類型: SRAM
RAM 容量: 24K x 16
電壓 - 電源 (Vcc/Vdd): 1.62 V ~ 1.98 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 100-LQFP
包裝: 托盤
56855 Technical Data, Rev. 6
36
Freescale Semiconductor
4.10 Enhanced Synchronous Serial Interface (ESSI) Timing
Table 4-10 ESSI Master Mode1 Switching Characteristics
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
1. Master mode is internally generated clocks and frame syncs
Parameter
Symbol
Min
Typ
Max
Units
SCK frequency
fs
152
2. Max clock frequency is IP_clk/4 = 60MHz / 4 = 15MHz for an 120MHz part.
MHz
SCK period3
tSCKW
66.7
ns
SCK high time
tSCKH
33.44
——
ns
SCK low time
tSCKL
33.44
——
ns
Output clock rise/fall time
4
ns
Delay from SCK high to SC2 (bl) high - Master5
tTFSBHM
-1.0
1.0
ns
Delay from SCK high to SC2 (wl) high - Master5
tTFSWHM
-1.0
1.0
ns
Delay from SC0 high to SC1 (bl) high - Master5
tRFSBHM
-1.0
1.0
ns
Delay from SC0 high to SC1 (wl) high - Master5
tRFSWHM
-1.0
1.0
ns
Delay from SCK high to SC2 (bl) low - Master5
tTFSBLM
-1.0
1.0
ns
Delay from SCK high to SC2 (wl) low - Master5
tTFSWLM
-1.0
1.0
ns
Delay from SC0 high to SC1 (bl) low - Master5
tRFSBLM
-1.0
1.0
ns
Delay from SC0 high to SC1 (wl) low - Master5
tRFSWLM
-1.0
1.0
ns
SCK high to STD enable from high impedance - Master
tTXEM
-0.1
2
ns
SCK high to STD valid - Master
tTXVM
-0.1
2
ns
SCK high to STD not valid - Master
tTXNVM
-0.1
ns
SCK high to STD high impedance - Master
tTXHIM
-4
0
ns
SRD Setup time before SC0 low - Master
tSM
4—
ns
SRD Hold time after SC0 low - Master
tHM
4—
ns
Synchronous Operation (in addition to standard internal clock parameters)
SRD Setup time before SCK low - Master
tTSM
4—
ns
SRD Hold time after SCK low - Master
tTHM
4—
ns
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