P R E L I M I N A R Y
SWITCHING CHARACTERISTICS over COMMERCIAL operating range
Synchronous Serial Interface (SSI) (20 MHz and 25 MHz)
Preliminary
Parameter
Description
Synchronous Serial Port Timing Requirements
20 MHz
Min
25 MHz
Min
No. Symbol
Max
Max Unit
75
77
tDVSH Data Valid to SCLK High
10
3
10
3
ns
ns
tSHDX SCLK High to SPI Data Hold
Synchronous Serial Port Timing Responses
71
72
78
tCLEV CLKOUTA Low to SDEN Valid
tCLSL CLKOUTA Low to SCLK Low
tSLDV SCLK Low to Data Valid
25
25
25
20
20
20
ns
ns
ns
Note:
All timing parameters are measured at 1.5 V with 50 pF loading on CLKOUTA unless otherwise noted. All output test conditions
are with CL = 50 pF. For switching tests, VIL = 0.45 V and VIH = 2.4 V, except at X1 where VIH = VCC – 0.5 V.
Synchronous Serial Interface (SSI) (33 MHz and 40 MHz)
Preliminary
Parameter
Description
Synchronous Serial Port Timing Requirements
33 MHz
Min
40 MHz
Min
No. Symbol
Max
Max Unit
75
77
tDVSH Data Valid to SCLK High
8
2
5
2
ns
ns
tSHDX SCLK High to SPI Data Hold
Synchronous Serial Port Timing Responses
71
72
78
tCLEV CLKOUTA Low to SDEN Valid
tCLSL CLKOUTA Low to SCLK Low
tSLDV SCLK Low to Data Valid
0
0
0
15
15
15
0
0
0
12
12
12
ns
ns
ns
Note:
All timing parameters are measured at 1.5 V with 50 pF loading on CLKOUTA unless otherwise noted. All output test conditions
are with CL = 50 pF. For switching tests, VIL = 0.45 V and VIH = 2.4 V, except at X1 where VIH = VCC – 0.5 V.
Am186/188EM and Am186/188EMLV Microcontrollers
93
AMD [ AMD ]
