HD6433935 Hitachi, HD6433935 Datasheet - Page 387
HD6433935
Manufacturer Part Number
HD6433935
Description
8-Bit MICROCONTROLLER
Manufacturer
Hitachi
Datasheet
1.HD6433935.pdf
(521 pages)
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The receiver warm up sequence while decoding when all warm up settings are enabled is shown in
figure 12-9.
3. Host Initiated Receiver Warm Up Sequence
The host can cause the FLEX decoder to warm-up the receiver in three ways: (1) by turning on the
FLEX decoder by setting the ON bit in the control packet; (2) by requesting a noise detect by
setting the SND bit in the roaming control packet; or (3) by requesting an A-word search by
setting the SAS bit in the roaming control packet. When the FLEX decoder warms up the receiver
in response to a host request, the first warm up setting, if enabled, is applied to the receiver control
lines for the amount of time programmed for that setting. Each subsequent warm up setting is
applied to the receiver control lines for their corresponding time until a disabled warm up setting is
found. Once a disabled warm up setting is found, the “3200sps Sync Setting” (for ON and SND
warm ups) or the “1600sps Sync Setting” (for SAS warm ups) is applied to the receiver control
lines and the decoder does not expect valid signal until after the “3200sps Sync Warm Up Time”
(for ON, SND, and SAS warm ups) has expired. In figure 12-10 the receiver warm up sequence
when the host initiates a warm-up sequence and when all warm up settings are enabled is shown.
LINE SETTING
LINE SETTING
RECEIVER
RECEIVER
CONTROL
CONTROL
Warm Up
Off
Off Time
Off
Figure 12-10 Host Initiated Receiver Warm Up Sequence
Possible
Possible
LOBAT
LOBAT
Check
Check
Figure 12-9 Automatic Receiver Warm Up Sequence
Warm Up
Warm Up
Setting 1
Warm Up
Warm Up
Setting 1
Time 1
Time 1
Possible
Possible
LOBAT
LOBAT
Check
Check
Warm Up
Warm Up
Setting 2
Warm Up
Setting 2
Warm Up
Time 2
Time 2
Possible
Possible
LOBAT
Check
LOBAT
Check
160 ms
Warm Up
Warm Up
Setting 3
Warm Up
Warm Up
Setting 3
Time 3
Time 3
Possible
Possible
LOBAT
Check
LOBAT
Check
Warm Up
Warm Up
Setting 4
Warm Up
Setting 4
Warm Up
Time 4
Time 4
Possible
Possible
LOBAT
LOBAT
Check
Check
Warm Up
Warm Up
Setting 5
Warm Up
Warm Up
Setting 5
Time5
Time5
Possible
Possible
LOBAT
LOBAT
Check
Check
Warm Up
1600sps or 3200sps
3200sps
Time
Sync
EXTS1 & EXTS0
EXTS1 & EXTS0
Sync Setting
expected to be
Sync Setting
expected to be
signals are
3200sps
signals are
valid here.
valid here.
375
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