AS1860 datasheet(39/51 Pages) ETC2

39 / 51 page

AS1860

Akros Silicon, Inc.

6399 San Ignacio Avenue, Suite 250, San Jose, CA 95119 USA

408.746.9000



http://www.AkrosSilicon.com

Table 29 - Device Control and I/O Status (R/W) - 06h

Bit

Function

Description

Reset State

reserved

do not write to this data bit

Reset all registers

1 = force reset all registers

0 = no resets

Enable Interrupts

1 = enable interrupts that are masked on

0 = no interrupts enabled

Disable PGOOD reset

1 = PGOOD fault will not reset registers

0 = PGOOD fault will reset registers

reserved

do not write to this data bit

reserved

do not write to this data bit

General-Purpose Output (GPOP)

GPOP pin reflects the state of this bit

General-Purpose Input (GPIP)

This bit reflects the state of the GPIP pin

Table 30 - Watchdog Timeout (R/W) - 07h

Bit

Function

Description

Reset State

D7 of 8-bit watchdog timer

Watchdog timeout counter value (125ms increments),

used in Software Mode only.

FF = max value (32 sec)

01 = min value (125ms)

00 = reserved, do not use

D6 of 8-bit watchdog timer

D5 of 8-bit watchdog timer

D4 of 8-bit watchdog timer

D3 of 8-bit watchdog timer

D2 of 8-bit watchdog timer

D1 of 8-bit watchdog timer

D0 of 8-bit watchdog timer

Table 31 - ADCIN Voltage (Read-Only) - 08h

Bit

Function

Description

Reset State

D7 of 8-bit voltage measure

8-bit measurement of voltage at ADCIN pin (primary

side). The A/D runs continuously with a 100Hz sampling

rate (minimum), and can be read at full I2C speed.

FF (hex) = 2.5 V

00 (hex) = 0 V

step size = 9.80 mV

D6 of 8-bit voltage measure

D5 of 8-bit voltage measure

D4 of 8-bit voltage measure

D3 of 8-bit voltage measure

D2 of 8-bit voltage measure

D1 of 8-bit voltage measure

D0 of 8-bit voltage measure

Table 32 - ADCIN Alarm Threshold (R/W) - 09h

Bit

Function

Description

Reset State

D7 of 8-bit A/D Interrupt Threshold

8 bit Threshold for A/D Alarm Interrupt (if enabled) from

ADCIN input pin.

FF (hex) = 2.5V

00 (hex) = 0 V

step size = 9.80 mV

D6 of 8-bit A/D Interrupt Threshold

D5 of 8-bit A/D Interrupt Threshold

D4 of 8-bit A/D Interrupt Threshold

D3 of 8-bit A/D Interrupt Threshold

D2 of 8-bit A/D Interrupt Threshold

D1 of 8-bit A/D Interrupt Threshold

D0 of 8-bit A/D Interrupt Threshold

Table 33 - PD Status and System Clock Control (R/W) - 0Ah

Bit

Function

Description

Reset State

reserved

do not write to this data bit

LDET

1 = Local power supply detected

0 = no Local power supply detected

AT_DET

1 = IEEE® 802.3at, or, Local Power mode detection

0 = IEEE® 802.3af mode detection

CLIM

1 = 750ma (min) PoE current limit

0 = 375ma (min) PoE current limit

Note that CLIM status is not valid in Local Power mode

(LDET status bit D6=1).

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