AFS090 datasheet(96/334 Pages) MICROSEMI

96 / 334 page

Device Architecture

2- 80

R e visio n 2

Table 2-36 describes each pin in the Analog Block. Each function within the Analog Block will be

explained in detail in the following sections.

Table 2-36 • Analog Block Pin Description

Signal Name

Number

of Bits

Direction

Function

Location of

Details

VAREF

Input/Output Voltage reference for ADC

ADC

ADCGNDREF

Input

External ground reference

ADC

MODE[3:0]

Input

ADC operating mode

ADC

SYSCLK

Input

External system clock

TVC[7:0]

Input

Clock divide control

ADC

STC[7:0]

Input

Sample time control

ADC

ADCSTART

Input

Start of conversion

ADC

PWRDWN

Input

ADC comparator power-down if 1.

When asserted, the ADC will stop

functioning, and the digital portion of

the

analog

block

will

continue

operating. This may result in invalid

status flags from the analog block.

Therefore,

Microsemi

does

not

recommend asserting the PWRDWN

pin.

ADC

ADCRESET

Input

ADC resets and disables Analog Quad

– active high

ADC

BUSY

Output

1 – Running conversion

ADC

CALIBRATE

Output

1 – Power-up calibration

ADC

DATAVALID

Output

1 – Valid conversion result

ADC

RESULT[11:0]

Output

Conversion result

ADC

TMSTBINT

Input

Internal temp. monitor strobe

ADC

SAMPLE

Output

1 – An analog signal is actively being

sampled (stays high during signal

acquisition only)

0 – No analog signal is being sampled

ADC

VAREFSEL

Input

0 = Output internal voltage reference

(2.56 V) to VAREF

1 = Input external voltage reference

from VAREF and ADCGNDREF

ADC

CHNUMBER[4:0]

Input

Analog input channel select

Input

multiplexer

ACMCLK

Input

ACM clock

ACM

ACMWEN

Input

ACM write enable – active high

ACM

ACMRESET

Input

ACM reset – active low

ACM

ACMWDATA[7:0]

Input

ACM write data

ACM

ACMRDATA[7:0]

Output

ACM read data

ACM

ACMADDR[7:0]

Input

ACM address

ACM

CMSTB0 to CMSTB9

Input

Current monitor strobe – 1 per quad,

active high

Analog Quad

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