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MC44353DW View Datasheet(PDF) - Motorola => Freescale

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MC44353DW Datasheet PDF : 20 Pages
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MC44353 MC44354 MC44355
Test Modes
Various test modes can be enabled, by means of bits
TB0–2 and X0–1. These operate by assigning some internal
signals on the UHF phase comparator output current sources
as outlined in the following 2 tables.
Sound Section Test Modes
The Sound PLL is tested in a similar fashion, and
responds to States 6 and 7 by placing the output of the sound
PLL programmable divider on the upper current source.
Table 3. Sound Subcarrier Frequency
Table 1. Test Mode 1
Test Bits TB0 to TB2 are located in C0, bits 0 to 2:
TB2 TB1 TB0 State Function
0
0
0
0 See Table Test Mode 2
0
0
1
Normal Operation, But Test
1 Pattern Geneartor Disabled
SFD1
SFD0
Sound Subcarrier Freq (MHz)
0
0
4.5
0
1
5.5
1
0
6.0
1
1
6.5
NOTE: 1. Bits SFD1–0 are located in C0 bits 4 and 3.
0
1
0
Upper Source On, Lower
2 Source Off
0
1
1
Lower Source On, Upper
3 Source Off
Figure 15. CCIR Test Line 330
Normal Operation with
1
0
0
4 Inverted Charge Polarity
*1.0
High Impedance
0.86
1
0
1
5
0.72
Test Ref divider on Upper
0.58
1
1
0
6
Source (Fref), Lower Source Off
0.44
**0.3
Test Progr. divider on Lower
1
1
1
7
Source (Fout/2), Upper Source Off
40
1
Step 0
2
3
4
5
Table 2. Test Mode 2
Bits X0 and X1 are located in FL, bits 0 and 1:
X1 X0 State Function
Normal Operation with Non–Inverted
0
0
0a Charge Pump Polarity
Normal Inverted Operation (same as
0
1
0b mode 4), but Transient Output Inhibit
Disabled.
Normal Inverted Operation (same as
1
0
0c mode 4), but Transient Output Inhibit
Circuitry Forced (output disabled).
Normal Inverted Operation (same as
1
1
0d mode 4), but Transient Output Inhibit
counter Sped up (64 times).
NOTE: Not to scale
*100 IRE
** 1 IRE
Figure 16. Noise Measurement/Weighting Filter
0
–4
Approximately Characteristic of Standard
Independent Filter in conformity with CCIR Rec. 567
–8
a
–12
In normal operation, the phase comparator pulls high if the
UHF frequency is too high, and pulls low when the UHF
–16
0
1
2
3
4
5
frequency is too low. This mode is used when the tuning
f
MHz
voltage is generated by the internal inverting operational
amplifier, so in this case mode 4 (100) must be used.
Switching in mode 0d will reset the transient delay counter,
which will time out at an accelerated rate of 64 times the
normal rate.
MOTOROLA ANALOG IC DEVICE DATA
11
 

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