STV2050A STMicroelectronics, STV2050A Datasheet - Page 58

• Manufacturer Part Number: STV2050A
• Description: IC DGTL CONVERGENCE PROC 80-PQFP
• Manufacturer: STMicroelectronics
• Type: Videor

Specifications of STV2050A

• Applications: HDTV
• Mounting Type: Surface Mount
• Package / Case: 80-MQFP, 80-PQFP
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STV2050A - ELECTRICAL LOOP
11.5.2 OGAH and OGAV Pins
The OGAH (pin 57) and OGAV (pin 58) pins are multi-level output pins. In addition to the
normal digital output function (logical “0” and “1”), they can drive a very stable current and can
be switched to high impedance. The stable current and the high impedance can be used to
generate the reference voltage across a grounded resistor for the gain and offset detection
comparators.
Each pad is controlled by two corresponding bits in the E4 register.
Figure 32. E4 Register
Attention: The OGAV and OGAH pins cannot both drive I
58/83
GAH[1:0]
GAV[1:0]
control bit 1
control bit 2
control bit 1
control bit 2
GAH
GAH
GAV
GAV
0 0 = High impedance
0 1 = “0”
1 0 = Iref
1 1 = “1”
0 0 = High impedance
0 1 = “0”
1 0 = Iref
1 1 = “1”
2
REF
at the same time
OGAV
OGAH
.