UPD64084 NEC, UPD64084 Datasheet - Page 30

• Manufacturer Part Number: UPD64084
• Description: THREE-DIMENSIONAL Y/C SEPARATION LSI WITH ON-CHIP MEMORY
• Manufacturer: NEC

13. EXTEND DIGITAL INPUT / OUTPUT
13.1 Usage of extend digital I/O terminals
serial bus DYCOS.
13.2 Digital YC output format
usual digital I/O pin DYCO9 to DYCO0. When using in input mode, input 10-bit digitized composite video signal that is
sampled by 4fsc. And when using in output mode, EXTDYCO9 (MSB) to EXTDYCO0 (LSB) pins alternately output 10
bits of Y signals in straight binary and 10 bits of C signals in offset binary. And EXTALTF pin outputs alternative flag of
Y or C signals. When ALTF = 'L' means "C Signal Outputs", when ALTF = 'H' means "Y Signal Outputs".
resistant.
13.3 Pin Treatment
30
This device have the extend digital I/O terminals EXTDYCO9-EXTDYCO0 in addition to DYCO9-DYCO0.
Using these terminals, the digital in to digital out system is available.
The extended digital I/O pin EXTDYCO9 to EXTDYCO0 becomes effective by setting serial bus to EXTDYCO = 1.
At this time, internal ADC can not be available. The I/O mode selection of EXTDYCO9 to EXTDYCO0 are set by
When using input mode of DYCOn or EXTDYCOn pins, insert serial resistor in the lines.
The specification of the digital input and output for the extended digital I/O pin EXTDYCO9 to EXTDYCO0 is same as
The internal ADC and extended digital I/O can’t work at the same time. And extended digital I/O pins have 3.3 V
When the extended digital I/O pin EXTDYCO9 to EXTDYCO0 aren't used, these pins set open.
Note By setting HIZEN (SA16h, D4) = 1, these pin status are set to Hi-Z.
EXTDYCO
0
0
0
1
1
1
1
Serial bus
EXADINS
0
1
0
0
1
0
1
Table 13-1. Mode setting for extend digital I/O terminals
DYCOS[1]
0
x
1
0
0
1
1
Low
Low
DYCOn
OUT
OUT
OUT
IN
IN
Data Sheet S16021EJ2V0DS
Note
Note
EXTD YCOn
Low
Low
Low
Low
OUT
OUT
IN
Note
Note
Note
Note
Condition of each terminals
FLAG
FLAG
FLAG
ALTF
4fsc
Low
Low
4fsc
EXTALTF
FLAG
FLAG
4fsc
Low
Low
Low
Low
OFF
OFF
OFF
A/D
ON
ON
ON
ON
PD64084
D/A
ON
ON
ON
ON
ON
ON
ON