BUF16821-Q1 Datasheet, PDF (23/38 Pages) Texas Instruments – Programmable Gamma-Voltage Generator

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BUF16821-Q1
SBOS712 – MAY 2014
7.5.2.4 MaxBank
The device can provide the user with the number of times the nonvolatile memory of a particular DAC and VCOM
channel nonvolatile memory is written to for the current memory bank. This information is provided by reading the
register at pointer address 111111.
There are two ways to update the MaxBank register:
1. After initiating a single acquire command, the device updates the MaxBank register with a code
corresponding to how many times that particular channel memory is written to.
2. Following a general acquire command, the device updates the MaxBank register with a code corresponding
to the maximum number of times the most used channel (OUT1–16 and VCOMs) is written to.
MaxBank is a read-only register and is only updated by performing a general- or single-channel acquire.
Table 3 shows the relationship between the number of times the nonvolatile memory is programmed and the
corresponding state of the MaxBank Register.
NUMBER OF TIMES WRITTEN TO
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Table 3. MaxBank Details
RETURNS CODE
0000
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
7.5.2.5 Parity Error Correction
The device provides single-bit parity error correction for data stored in the nonvolatile memory to provide
increased reliability of the nonvolatile memory. If a single bit of nonvolatile memory for a channel fails, the device
corrects for the failure and updates the appropriate DAC with the intended value when its memory is acquired.
If more than one bit of nonvolatile memory for a channel fails, the device does not correct for it, and updates the
appropriate DAC and VCOM with the default value of 1000000000.
Copyright © 2014, Texas Instruments Incorporated
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