SAA7118 Datasheet, PDF (71/169 Pages) NXP Semiconductors – Multistandard video decoder with adaptive comb filter and component video input

Philips Semiconductors
Multistandard video decoder with adaptive
comb filter and component video input
Preliminary specification
SAA7118
Table 26 Clock and real-time synchronization signals
SYMBOL PIN⁽¹⁾ I/O
DESCRIPTION
BIT
Crystal oscillator
XTALI
B4 I input for crystal oscillator or reference clock
−
(155)
XTALO
A3 O output of crystal oscillator
−
(156)
XTOUT A2 O reference (crystal) clock output drive (optional)
(158)
XTOUTE[14H[3]]
Real-time signals (RT port)
LLC
LLC2
RTCO
P4 O line-locked clock, nominal 27 MHz, double pixel clock locked to the
−
(46)
selected video input signal
N5 O line-locked pixel clock, nominal 13.5 MHz
−
(48)
L10 O real-time control output, transfers real-time status information
−
(71)
supporting RTC level 3.1 (see document “RTC Functional Description”,
available on request)
RTS0
M10 O real-time status information line 0, can be programmed to carry various RTSE0[3:0] 12H[3:0]
(69)
real-time information (see Table 56)
RTS1
N10 O real-time status information line 1, can be programmed to carry various RTSE1[3:0] 12H[7:4]
(70)
real-time information (see Table 57)
Note
1. Pin numbers for QFP160 in parenthesis.
9.4 Interrupt handling
9.4.1 INTERRUPT FLAGS
The pin INT_A is an open-drain output (active LOW). All
flags can be independently enabled. For the default setting
all flags are disabled after reset. For the description of
interrupt mask registers see Section 15.4.
9.4.1.1 Power state
PRDON: a power fail has been detected during normal
operation, the device needs re-programming.
9.4.1.2 Video decoder
INTL: interlaced/non-interlaced source detected.
HLCK: horizontal PLL state changed (locked ↔ unlocked).
HLVLN: vertical lock state changed (locked ↔ unlocked).
FIDT: detected field frequency has changed
(50 Hz ↔ 60 Hz).
RDCAP: ready for capture (true ↔ false).
DCSTD[1:0]: detected colour standard has changed or
colour lost.
COPRO, COLSTR and TYPE3: various levels of copy
protection have changed.
9.4.1.3 VBI data slicer
VPSV: VPS identification found or lost.
PPV: PALplus identification found or lost.
CCV: Closed caption identification found or lost.
9.4.1.4 Scaler
ERROF: scaler output formatting error detected.
9.4.2 STATUS READING CONDITIONS
The status information read after an interrupt will always
be the LATEST state, that means the status will not be
‘frozen’ when an interrupt is being generated. Therefore, if
there is a long time between interrupt generation and
status reading, the original trigger condition might have
been overridden by the present state.
2001 May 30
71