GS3590 datasheet(72/118 Pages) SEMTECH

72 / 118 page

GS3590

Final Data Sheet Rev.4



PDS-061414 September 2017

72 of 118

Semtech

Proprietary & Confidential

www.semtech.com

Step 2 – GSPI Access Allowed

a) Host sets EYE_MON_INT_CFG_3 (register address 0x57) to 0x8006.

b) If there are multiple devices on the GSPI chain, the host should configure the unit

address of each device. See Section 4.10.9 for further information on unit

addressing.

c) Host sets custom application specific settings.

d) Normal operation begins.

Figure 4-39: Power-Up Sequence.

4.10.13 Host Initiated Device Reset

The GS3590 includes a reset function accessible via the device's host interface, which

reverts all internal logic and register values to their default values.

The device can be reset with a single write of AD00h to the RESET_CONTROL bits of the

CONTROL_RESET register, which will assert and de-assert the device reset within the

duration of the GSPI write access Data Word.

The device can be placed and held in reset by writing AA00h to the RESET_CONTROL

bits of the CONTROL_RESET register. Subsequent writes of DD00h to the

RESET_CONTROL bits will de-assert device reset.

The current state of user-initiated device reset can be read from the RESET_CONTROL

bits of CONTROL_RESET register.

While in reset, host interface access to any other register will not be functional and all

logic and configuration registers will be in reset state. While in reset, serial digital

differential output behaviour is undefined. The digital logic and registers within the

device will exit the reset state 5ms after device reset is de-asserted.

The following timing sequence must be observed to initiate a device reset.

5.11 ms – no GSPI Access Allowed

All blocks reset.

All devices that

received reset

command will

have their unit

address reset to

After Completion of Reset, device

automatically initiates default

configuration boot-up.

Eye Monitor

Reset:

Host

writes 0x8006

to register 0x57

at unit address

Command will

be broadcast to

all devices that

were reset.

Normal Operation Begins.

Host must reconfigure the unit addresses of

devices that were reset to 0.

After which, host may read/write any

use broadcast write to concurrently write a

command to all devices on the GSPI chain.

Application Defined GSPI Read/Write

Access.

Eye

Monitor

Reset.

Default

Configuration

Boot-Up

Complete.

5 ms

110 μs

Internal Reset

Sequence

Complete.

Host writes

0xAD00 to

to reset device.

Host may reset

all devices by

using broadcast

mode.

GSPI Access..

Device

Configuration

Booting.

Device Blocks

Resetting.

GSPI Access Allowed

GS3590 Datasheet(PDF) 72 Page - Semtech Corporation

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