参数资料
型号: DSP56855BUE
厂商: Freescale Semiconductor
文件页数: 32/52页
文件大小: 0K
描述: IC DSP 16BIT 120MHZ 100-LQFP
标准包装: 90
系列: 568xx
核心处理器: 56800E
芯体尺寸: 16-位
速度: 120MHz
连通性: EBI/EMI,SCI,SSI
外围设备: DMA,POR,WDT
输入/输出数: 18
程序存储器容量: 48KB(24K x 16)
程序存储器类型: SRAM
RAM 容量: 24K x 16
电压 - 电源 (Vcc/Vdd): 1.62 V ~ 1.98 V
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 100-LQFP
包装: 托盘
56855 Technical Data, Rev. 6
38
Freescale Semiconductor
Table 4-11 ESSI Slave 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. Slave mode is externally 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 a 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 - Slave5
tTFSBHS
-1
29
ns
Delay from SCK high to SC2 (wl) high - Slave5
tTFSWHS
-1
29
ns
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
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