参数资料
型号: MCF54418CMJ250
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: MICROPROCESSOR, PBGA256
封装: 12 X 12 MM, ROHS COMPLAINT, MAPBGA-256
文件页数: 37/60页
文件大小: 1107K
代理商: MCF54418CMJ250
MCF5441x ColdFire Microprocessor Data Sheet, Rev. 6
Preliminary—Subject to Change Without Notice
Electrical characteristics
Freescale Semiconductor
42
Table 24. SSI timing — master modes1
1 All timings specified with a capacitive load of 25pF.
Num
Description
Symbol
Min
Max
Units
Notes
S1
SSI_MCLK cycle time
tMCLK
15.15
ns
2
2 SSI_MCLK can be generated from SSI_CLKIN or a divided version of the internal system clock (f
sys).
S2
SSI_MCLK pulse width high / low
45%
55%
tMCLK
S3
SSI_BCLK cycle time
tBCLK
80
ns
3
3 SSI_BCLK can be derived from SSI_CLKIN or a divided version of the internal system clock (f
sys).
S4
SSI_BCLK pulse width
45%
55%
tBCLK
S5
SSI_BCLK to SSI_FS output valid
15
ns
S6
SSI_BCLK to SSI_FS output invalid
0
ns
S7
SSI_BCLK to SSI_TXD valid
15
ns
S8
SSI_BCLK to SSI_TXD invalid / high impedance
0
ns
S9
SSI_RXD / SSI_FS input setup before SSI_BCLK
15
ns
S10
SSI_RXD / SSI_FS input hold after SSI_BCLK
0
ns
Table 25. SSI timing — slave modes1
1 All timings specified with a capacitive load of 25pF.
Num
Description
Symbol
Min
Max
Units
Notes
S11
SSI_BCLK cycle time
tBCLK
80
ns
S12
SSI_BCLK pulse width high / low
45%
55%
tBCLK
S13
SSI_FS input setup before SSI_BCLK
10
ns
S14
SSI_FS input hold after SSI_BCLK
2
ns
S15
SSI_BCLK to SSI_TXD / SSI_FS output valid
15
ns
S16
SSI_BCLK to SSI_TXD / SSI_FS output invalid / high
impedance
0—
ns
S17
SSI_RXD setup before SSI_BCLK
15
ns
S18
SSI_RXD hold after SSI_BCLK
2
ns
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