Z9035112PSC Zilog, Z9035112PSC Datasheet - Page 34

• Manufacturer Part Number: Z9035112PSC
• Description: IC 64KW DIG TV CTRL OTP 52-SDIP
• Manufacturer: Zilog

Specifications of Z9035112PSC

• Applications: TV Controller
• Core Processor: Z8
• Program Memory Type: OTP (128 kB)
• Controller Series: Digital Television Controller (DTC)
• Ram Size: 2K x 8
• Interface: I²C, 2-Wire Serial
• Number Of I /o: 25
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 52-SDIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

This function employs a 4-bit resolution, flash A-to-D converter. The six-to-one analog
input multiplexor and conversion start circuits are controlled by the user program. The
4-bit conversion result is available to be read by the CPU at the end of each conversion.
One input channel (ADC0) is dedicated for quantizing VBI (vertical blank interval) data
for subsequent digital signal processing. Another channel, ADC5, is typically used for
VSYNC separation from the composite TV signal. These channels (ADC0 and ADC5)
feature a special video clamp circuit that provides DC restoration of the composite video
input signal. Typical VBI applications include Line 21 Closed Caption, Electronic Data
Services, and StarSight Telecast. The range of ADC0 and ADC5 is from 1.5 to 2.0 V.
The four remaining channels of ADC (ADC1, ADC2, ADC3, and ADC4) are general pur-
pose. They are typically used for tuner automatic frequency control and analog key entry.
The range of ADC1–ADC4 is from 0 to 5.0 V.
The 4-bit ADC in the Z90356 features six multiplexed inputs.
The allowed range of the input signals is different for different ADC inputs according to
Table 7.
Reference voltages that have been generated internally define the maximum range of the
input signal for the ADC.
Nominal values are as follows:
For other V
Ref+ = 2.0 V
Ref– = 1.5 V @ V
Ref+ = 0.4 * V
CC
values, the reference voltages must be prorated as follows:
CC
CC
= 5.0 V