73M1866B/73M1966B Data Sheet
DS_1x66B_001
3.3 Interface Timing Specification
There are three interfaces associated with the 73M1x66B: the SPI interface, the PCM highway interface
and the line interface. This section provides the timing specification for the SPI interface and the PCM
highway interface.
3.3.1 SPI Interface
Table 10 lists the characteristics for the SPI interface.
Table 10: SPI Interface Switching Characteristics
Parameter
Symbol Min Typ Max Unit
SCLK cycle time1
SCLK rise time
tscy
tscr
tscf
tics
62.5
–
–
25
25
–
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
–
–
–
–
–
–
–
–
–
–
6
–
SCLK fall time
CS setup time
CS hold time
SDI setup time
25
20
25
20
–
–
tich
tids
tidh
todd
todo
todh
tidt
–
–
SDI hold time
SDO turn on delay
SDO turn off delay
SDO hold time
20
20
20
–
–
–
SDI to SDITHRU propagation delay
–
Note1: The minimal value of this parameter is for the case where only one 73M1906B is connected to the
host. If the daisy chain mode is used, the minimum SCLK cycle time increases according to the number
of slaves in the chain.
SCLK
tscy
tics
tich
CS
SDI
tids
tidh
todd
todh
todo
SDO
Figure 7: SPI Timing Diagram
18
Rev. 1.6
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
