SPT2210SCT 查看數據表（PDF） - Signal Processing Technologies
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SPT2210SCT Datasheet PDF : 22 Pages
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EXTERNAL SETTING PIN DESCRIPTIONS
The SPT2210 has the capability of operating without a
host interface and allowing certain programmable set-
tings to be accessed via external pins. When the RD_,
WR_ and CS_ pins are all held (or tied) low for a mini-
mum of three clock pulses, the D7...0 bus and the RS pin
can be used for external setting of various modes and
functions. (When these pins are not used as external set-
ting pins, they are ordinary pins for host interface.)
Table XVI below shows the pin function assignments and
settings for the D7...0 and RS pins.
Figure 9 – Multiplexing in the External Key Mode
HSYNC
Key
YD7…0
CD7…0
GD3…0
Table XVI – D7...0 and RS Pin External Setting Description Table
Pin #
D7
D6
D5
Function
Composite video mode
Color bars
Phase reset (NTSC only)
Bit Setting
0
1
0
1
0
D4,3
SYNC/BLNK I/O
D2...0
Video mode setting
RS
Setup (NTSC only)
1
D4
D3
0
0
0
1
1
0
1
1
D2 D1 D0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
0
1
Description
Y/C (S-Video)
Composite video
Normal operation
Generate color bars
Subcarrier phase is reset at every
odd frame
Free run; subcarrier phase is not reset
SYNC, BLNK, I/O
BLNK Input
SYNC Input
BLNK Output
Reserved
Mode
NTSC 4Fsc
NTSC Square Pixel
NTSC CCIR 601 525/60
Setting disabled
PAL 4Fsc
PAL Square Pixel (ƒS=14.7500 MHz)
PAL CCIR 601 625/50
PAL Square Pixel (ƒS=12.1875 MHz)
Setup enabled
No setup
SPT
SPT2210
17
8/22/00
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