MC68HC912BD32 Datasheet, PDF (187/292 Pages) Freescale Semiconductor, Inc – Advance Information

Freescale Semiconductor, Inc.
Byteflight™ Module
Functional Overview
Table 37). A valid synchronization edge is detected if the pulse length is
correct independent of the pulse position. If the pulse position is not
correct either a pulse too early or a sync lost error condition is set.
ALARM and NORMAL SYNC are distinguished only by the bits SYNAIF
and SYNNIF.
INDICATES VALID SYNCHRONIZATION EDGE AND SETS SYNC-FLAG
t_cyc
>t_w0
t_wx0
t_wxi
t_wxj
SYNC NORMAL
VALID SYNC NORMAL
VALID SYNC ALARM
t_syn_n
t_cyc_max
SYNC ALARM
t_syn_a
t_syn_n
t_syn_a
t_pulse
SYNC TOO EARLY
SYNC TOO EARLY & ALARM
t_syn_n
t_syn_a
NOT A VALID SYNC LENGTH
SYNC LOST
ALARM
SYNC LOST
PULSE ERROR
SYNC LOST
17-sibus
SYNC PULSE DETECT WINDOWS
Figure 32 SYNC Pulse Errors Detection
Byteflight™ Module
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MC68HC912BD32 Rev 1.0