DSA504RT datasheet(15/73 Pages) MICROCHIP

15 / 73 page

DSA504RT

Functional Description

Preliminary Data Sheet

DS50004033A - 15

Table 3-1. GPIO Pin Function (continued)

Selection

0-31 (5 bits)

Function

Direction

Function Description

Comment

SEL

(Note 1)

Input

Reference Clock Select

Not available on DSA504RT, as it does not include an

internal MO.

FAULT0

Output

PLL_LOL (PLL Loss of Lock) FAULT0=L=PLL locked FAULT0=H=PLL out of lock

1 OTP bit is reserved to select if PLL_LOL and

PLL_LOS will squelch the buffer’s outputs or no.

FAULT1

Output

PLL_LOS (PLL Loss of

Source)

FAULT1=L External clock present and monitored.

FAULT1=H LOS of external clock

1 OTP bit is reserved to select if PLL_LOL and

PLL_LOS will squelch the buffer’s outputs or no.

FAULT2

Output

Temperature Sensor is

out of range. Programmed

ADC range –40°C to

+105°C

FAULT2=L=Temperature within range

FAULT2=H=Temperature out of range

FAULT5

Output

OTP Checksum failure (not

part of Poly, custom RTL

code needed)

FAULT5=L=No failure FAULT5=H=Failure

Applies to the customer configuration. This fault

generates a flag, but does not stop the part.

…

SYNC

(Note 1)

Input

Synchronize BED in same

Frequency Plan

Synchronizes BED on 0->1 edge trigger

…

STDBY_b

(Note 1)

Input

Low power standby mode L: OPERATE to STDBY

H: Go to OPERATE, Stay in OPERATE

CHIPID

(Note 2)

Input

Controlling LSB in I2C

Client Address

L={CHIPID[6:1],0} or {CHIPID[9:1],0}

H={CHIPID[6:1],1} or {CHIPID[9:1],1}

Notes:

1. These GPIOs have to be toggled one at a time with at least 10ms in between.

2. Should not be toggled after power-up.

3. The device only supports one GPIO controlling output enable for each of OUT0-OUT5. This makes, for example, decode

7 mutually exclusive with decodes 1-6 and decode 8 mutually exclusive with decodes 1-3 and 7.

4. The device only supports one GPIO controlling spread spectrum for each fractional divider. This makes, for example,

decode 14 mutually exclusive with decodes 12, 13, and 15.

DSA504RT Datasheet(PDF) 15 Page - Microchip Technology

DSA504RT Datasheet(HTML) 15 Page - Microchip Technology

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