18 54-0215 Rev. C
4 Digital 1000 Hz Synchronous Interface
4.1 Description (KVH Part No. 02-1222-02 & 02-1222-04)
The high-speed transistor-to-transistor level (TTL) synchronous serial interface provides
the same performance as the asynchronous interface, but with a standard output rate of
1000/sec. Figure 7 shows the typical signal timing for the interface.
Figure 7: High-speed Synchronous Signal Timing
The characteristics of the synchronous serial interface are listed in Table 7.
Table 7: Synchronous Serial Interface Characteristics
Signal Type
BIT (pin 8) – Built-in Test TTL Output
Low = OK, High = failure
Gnd (pin 11) – Ground Signal ground
Tclk (pin 12) – Clock TTL Output
Tdata (pin 13) – Serial Data TTL Output
1 = High
Tsync (pin 14) – Frame Sync TTL Output
Active high
Msync (pin 15) – Master Sync
Optional
TTL Input
Active high
All signals are standard TTL, Active High, Logic Level 3.3V
Data
Parity
Tclk (T=325ns)
Tsync
Tdata
BIT
N/A
Type
025262728293031
145µs
±14.5µs
Msync
(Optional)
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