SAA4970T Datasheet, PDF (20/32 Pages) NXP Semiconductors – Economical video processing IC ECOBENDIC

Philips Semiconductors
Economical video processing IC
(ECOBENDIC)
Preliminary specification
SAA4970T
REGISTER BIT
NAME
Register 34H (reset CD_intDb)
34H
0 to 7 reset CD_intDb
Register 35H (set IE)
35H
0 to 7 set IE
Registers 36H and 37H (win_PLL)
36H
0 to 8 set win_PLL
37H
0 to 8 reset win_PLL
Registers 38H and 39H (WE)
38H
0 to 7 set WE
39H
0 to 7 reset WE
Register 3AH (reset IE)
3AH
0 to 7 reset IE
Register 3BH (update VHU register)
3BH
0 to 7 update VHU register
Register 3DH (interrupt + R1R2_cntr)
3DH
0
1 Interrupt Control (IT1)
2
3
4 en_R1_out
5 oe_CK1
6 en_R2_out
7 oe_CK2
Registers 3EH and 3FH (CLMP)
3EH
0 to 7 set CLMP
3FH
0 to 7 reset CLMP
FUNCTION
resets interrupt CD_intDb when address 34H is sent
sets rising edge of IE signal when register data = CNT_A
sets rising edge of win_PLL signal when register data = CNT_D
sets falling edge of win_PLL signal when register data = CNT_D
sets rising edge of WE signal when register data = CNT_A
sets falling edge of WE signal when register data = CNT_A
sets falling edge of IE signal when register data = CNT_A
sets rising or falling edge of VI2 when register data = CNT_F and
address 0DH or 0EH is sent
0
enables interrupt CB_intAb
enables interrupt PIP_intAc
enables interrupt Gi_intAa
output enable R1
output enable CK1
output enable R2
output enable CK2
sets rising edge of CLMP signal when register data = CNT_A
sets falling edge of CLMP signal when register data = CNT_A
Table 2 α value
BIT 1
0
0
1
1
BIT 0
0
1
0
1
α VALUE
0
1_⁄8
1_⁄4
1_⁄2
Table 3 β value
BIT 1
0
0
1
1
BIT 0
0
1
0
1
β VALUE
0
1_⁄8
1_⁄4
1_⁄2
1996 Oct 25
20