Table 3-13 SSI Master Mode
參數(shù)資料
型號: DSP56F826BU80
廠商: Freescale Semiconductor
文件頁數(shù): 35/56頁
文件大?。?/td> 0K
描述: IC DSP 80MHZ 64KB FLASH 100LQFP
標(biāo)準(zhǔn)包裝: 90
系列: 56F8xx
核心處理器: 56800
芯體尺寸: 16-位
速度: 80MHz
連通性: EBI/EMI,SCI,SPI,SSI
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 46
程序存儲器容量: 67KB(33.5K x 16)
程序存儲器類型: 閃存
RAM 容量: 4.5K x 16
電壓 - 電源 (Vcc/Vdd): 2.25 V ~ 2.75 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
56F826 Technical Data, Rev. 14
40
Freescale Semiconductor
3.10 Synchronous Serial Interface (SSI) Timing
Table 3-13 SSI Master Mode1 Switching Characteristics
Operating Conditions: VSSIO = VSS = VSSA = 0V, VDDA = VDDIO = 3.0–3.6V, VDD = 2.25–2.75V, TA = –40° to +85°C, CL ≤ 50pF, fop = 80MHz
1. Master mode is internally generated clocks and frame syncs
Parameter
Symbol
Min
Typ
Max
Units
STCK frequency
fs
102
2. Max clock frequency is IP_clk/4 = 40MHz / 4 = 10MHz for an 80MHz part.
MHz
STCK period3
tSCKW
100
ns
STCK high time
tSCKH
504
——
ns
STCK low time
tSCKL
504
——
ns
Output clock rise/fall time (STCK, SRCK)
4
—ns
Delay from STCK high to STFS (bl) high - Master5
tTFSBHM
0.1
0.5
ns
Delay from STCK high to STFS (wl) high - Master5
tTFSWHM
0.1
0.5
ns
Delay from SRCK high to SRFS (bl) high - Master5
tRFSBHM
0.6
1.3
ns
Delay from SRCK high to SRFS (wl) high - Master5
tRFSWHM
0.6
1.3
ns
Delay from STCK high to STFS (bl) low - Master5
tTFSBLM
-1.0
-0.1
ns
Delay from STCK high to STFS (wl) low - Master5
tTFSWLM
-1.0
-0.1
ns
Delay from SRCK high to SRFS (bl) low - Master5
tRFSBLM
-0.1
0
ns
Delay from SRCK high to SRFS (wl) low - Master5
tRFSWLM
-0.1
0
ns
STCK high to STXD enable from high impedance - Master
tTXEM
20
22
ns
STCK high to STXD valid - Master
tTXVM
24
26
ns
STCK high to STXD not valid - Master
tTXNVM
0.1
0.2
ns
STCK high to STXD high impedance - Master
tTXHIM
24
25.5
ns
SRXD Setup time before SRCK low - Master
tSM
4—
ns
SRXD Hold time after SRCK low - Master
tHM
4—
ns
Synchronous Operation (in addition to standard internal clock parameters)
SRXD Setup time before STCK low - Master
tTSM
4—
SRXD Hold time after STCK low - Master
tTHM
4—
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