Advanced Information

WM8191

WOLFSON MICROELECTRONICS LTD

AI Rev 3.1 April 2001

15

OUTPUT FORMATS

The digital data output from the ADC is available to the user in either 14-bit parallel or 8/7/4-bit wide

multiplexed formats by setting control bits MUXOP[1:0]. Latency of valid output data with respect to

VSMP is programmable by writing to control bits DEL[1:0]. The latency for each mode is shown in the

Operating Mode Timing Diagrams section.

Figure 12 shows the output data formats for Modes 1 – 2 and 4 – 6. Figure 13 shows the output data

formats for Mode 3. Table 1 summarises the output data obtained for each format.

MCLK

4+4+4+2-BIT

OUTPUT

A

AB

D

AB

C

14-BIT PARALLEL

OUTPUT

8+6 AND 7+7-BIT

OUTPUT

MCLK

4+4+4+2-BIT

OUTPUT

A

AB

14-BIT PARALLEL

OUTPUT

8+6 AND 7+7-BIT

OUTPUT

AB

C D

AB

Figure 12 Output Data Formats

(Modes 1

− 2, 4 − 6)

Figure 13 Output Data Formats (Mode 3)

OUTPUT

FORMAT

MUXOP[1:0]

OUTPUT

PINS

OUTPUT

14-bit parallel

00

OP[13:0]

A = d13, d12, d11, d10, d9, d8, d7, d6, d5, d4, d3,

d2, d1, d0

8+6-bit

multiplexed

01

OP[13:6]

A = d13, d12, d11, d10, d9, d8, d7, d6, d5

B = d4, d3, d2, d1, d0, CC, OVRNG

7+7-bit

10

OP[13:6]

A = d13, d12, d11, d10, d9, d8, d7, CC

B = d6, d5, d4, d3, d2, d1, d0, OVRNG

4+4+4+2-bit

(nibble)

11

OP[13:10]

A = d13, d12, d11, d10

B = d9, d8, d7, d6

C = d5, d4, d3, d2

D = d1, d0, CC, OVRNG

Table 1 Details of Output Data Shown in Figure 12 and Figure 13.

FLAGS

The following flags are output during multiplexed modes:

CC can be used in colour modes 1 and 5 to identify the green channel output, from which the blue

and red data can be identified.

INPUT

CC

RINP

0

GINP

1

BINP

0

Table 2 Input Sampled Flags CC[1:0]

OVRNG indicates that the current output data was produced by an input signal that exceeded the

input range limit of the device. 1 = out of range, 0 = within range.