Sharp 21KF-80S, Руководство по обслуживанию

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23
21KF-80S
Note
1. The function of pin 20, 28, 29, 31, 32, 35 and 44 is dependent on the IC version (mono intercarrier FM demodulator
/ QSS IF amplifier and East-West output or not) and on some software control bits. The valid combinations are given
in table 1.
2. The vertical guard function can be controlled via pin 49 or pin 50. The selection is made by means of the IVG bit in
subaddress 2BH.
Table 1 Pin functions for various versions
Note
1. When additional (external) selectivity is required for FM-PLL system pin 32 can be used as sound IF input. This
function is selected by means of SIF bit in subaddress 28H.
2. The reference output signal is only available for the CMB1/CMB0 setting of 0/1. For the other settings this pin is a
switch output (see also table 68).
INSSW2 45 2
nd
RGB / YUV insertion input
R2/VIN 46 2
nd
R input / V (R-Y) input
G2/YIN 47 2
nd
G input / Y input
B2/UIN 48 2
nd
B input / U (B-Y) input
BCLIN 49 beam current limiter input / (V-guard input, note 2)
BLKIN 50 black current input / (V-guard input, note 2)
RO 51 Red output
GO 52 Green output
BO 53 Blue output
VDDA 54 analog supply of Teletext decoder and digital supply of TV-processor (3.3 V)
VPE 55 OTP Programming Voltage
VDDC 56 digital supply to core (3.3 V)
OSCGND 57 oscillator ground supply
XTALIN 58 crystal oscillator input
XTALOUT 59 crystal oscillator output
RESET 60 reset
VDDP 61 digital supply to periphery (+3.3 V)
P1.0/INT1 62 port 1.0 or external interrupt 1 input
P1.1/T0 63 port 1.1 or Counter/Timer 0 input
P1.2/INT0 64 port 1.2 or external interrupt 0 input
IC version FM-PLL version QSS version
East-West Y/N N Y N Y
CMB1/CMB0 bits 00 01/10/11 00 01/10/11 00 01/10/11 00 01/10/11
AM bit
− − − − −
0 1
−
0 1
Pin 20 AVL EWD AVL EWD
Pin 28 AUDEEM SIFIN1
Pin 29 DECSDEM SIFIN2
Pin 31 SNDPLL SIFAGC
Pin 32 SNDIF
(1)
REFO
(2)
AVL/SNDIF
(1)
REFO
(2)
AMOUT REFO
(2)
AMOUT REFO
(2)
Pin 35 AUDEXT AUDEXT QSSO AMOUT AUDEXT QSSO AMOUT
Pin 44 AUDOUT controlled AM or audio out
SYMBOL PIN DESCRIPTION
TDA935
0
(IC801)