Datasheet

2−36
2.20.37 ROM Major Version Register
Address 82h
Default 03h
7 6 5 4 3 2 1 0
ROM major version
†
†
This register can contain a number from 0x01 to 0xFF.
Value = 0x03
2.20.38 ROM Minor Version Register
Address 83h
Default 21h
7 6 5 4 3 2 1 0
ROM minor version
†
†
This register can contain a number from 0x01 to 0xFF.
Value = 0x21
2.20.39 Vertical Line Count MSB Register
Address 84h
7 6 5 4 3 2 1 0
Reserved Vertical line count MSB
Vertical line count bits [9:8]
2.20.40 Vertical Line Count LSB Register
Address 85h
7 6 5 4 3 2 1 0
Vertical line count LSB
Vertical line count bits [7:0]
Registers 84h and 85h can be read and combined to extract the detected number of lines per frame. This can be used
with nonstandard video signals such as a VCR in fast-forward or rewind modes to synchronize the downstream video
circuitry.