
2000 Mar 15
115
Philips Semiconductors
Preliminary specication
PAL/NTSC/SECAM video decoder with adaptive PAL/NTSC
comb lter, VBI-data slicer and high performance scaler
SAA7114H
Table 91 I-port I/O enable, output clock and gated clock phase control; global set 87H[7:4]
Notes
1. X = don’t care.
2. IPCK3 and IPCK2 only affects the gated clock (subaddress 80H, bit ICKS2 = 1).
Table 92 I-port I/O enable, output clock and gated clock phase control; global set 87H[1:0]
15.5.3
SUBADDRESS 88H
Table 93 Power save control; global set 88H[3] and 88H[1:0]
X = don’t care.
OUTPUT CLOCK AND GATED CLOCK PHASE CONTROL
CONTROL BITS D7 TO D4(1)
IPCK3(2) IPCK2(2) IPCK1 IPCK0
ICLK default output phase
X
0
ICLK phase shifted by 1
2 clock cycle recommended for ICKS1 = 1 and
ICKS0 = 0 (subaddress 80H)
XX
0
1
ICLK phase shifted by about 3 ns
X
1
0
ICLK phase shifted by 1
2 clock cycle + about 3 ns alternatively to setting ‘01’
X
1
IDQ = gated clock default output phase
0
X
IDQ = gated clock phase shifted by 1
2 clock cycle recommended for gated
clock output
01
X
IDQ = gated clock phase shifted by about 3 ns
1
0
X
IDQ = gated clock phase shifted by 1
2 clock cycle + about 3 ns alternatively
to setting ‘01’
11
X
I-PORT I/O ENABLE
CONTROL BITS D1 AND D0
IPE1
IPE0
I-port output is disabled by software
0
I-port output is enabled by software
0
1
I-port output is enabled by pin ITRI at logic 0
1
0
I-port output is enabled by pin ITRI at logic 1
1
POWER SAVE CONTROL
CONTROL BITS
88H[3]
88H[1:0]
SLM3
SLM1
SLM0
Decoder and VBI slicer are in operational mode
X
0
Decoder and VBI slicer are in power-down mode; scaler only operates, if scaler
input and ICLK source is the X-port (refer to subaddresses 80H and 91H/C1H)
XX
1
Scaler is in operational mode
X
0
X
Scaler is in power-down mode; scaler in power-down stops I-port output
X
1
X
Audio clock generation active
0
X
Audio clock generation in power-down and output disabled
1
X