ADIS16COM1SLASHPCBZ datasheet(31/37 Pages) AD

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Preliminary Technical Data

ADIS16000/ADIS16229

Rev. PrA | Page 31 of 37

0 = active low

DO1 Polarity

1 = active high

0 = active low

STATUS/ERROR FLAGS

Critical system error flags are in the DIAG_STAT register for

each ADIS16229. These flags indicate various error or alarm

conditions that may influence system performance. Multiple

flags in these registers can be high at one time and the flags will

persist (go high again, after clearing) when the error conditions

continue to exist. The flags in bits 0 through 6 will remain in a

latch condition, until clearing the problem or clearing (using

Use GLOB_CMD[4]). The Alarm flags (upper byte) will latch if

ALM_CTRL[7] = 1 (See Table 41)

Table 84. DIAG_STAT

Page 1-6, Low Byte Address = 0x34, Read/Write

Bits

Description (Default = 0x)

Not used

System alarm (1 = error condition exists, 0 = no error)

Not used

Sensor Node 6 (1 = alarm condition, 0 = no alarm)

Sensor Node 5 (1 = alarm condition, 0 = no alarm)

Sensor Node 4 (1 = alarm condition, 0 = no alarm)

Sensor Node 3 (1 = alarm condition, 0 = no alarm)

Sensor Node 2 (1 = alarm condition, 0 = no alarm)

Sensor Node 1 (1 = alarm condition, 0 = no alarm)

Flash memory failure, from GLOB_CMD[5] test

[5:4]

Not used

SPI communication failure (SCLKs ≠ even multiple of

16)

Flash update failure

Power supply > 3.625 V

Power supply < 3.125 V

SELF-TEST

Set GLOB_CMD[2] = 1 (DIN = 0xBE02) (see Table 74) to run

an automatic self-test routine, which reports a pass/fail result to

DIAG_STAT[5] (see Table 84).

FLASH MEMORY MANAGEMENT

Set GLOB_CMD[5] = 1 (DIN = 0xB620) to run an internal

checksum test on the flash memory, which reports a pass/fail

result to DIAG_STAT[6]. The FLASH_CNT register (see Table 85)

provides a running count of flash memory write cycles. This is a

tool for managing the endurance of the flash memory. Figure 23

quantifies the relationship between data retention and junction

temperature.

Table 85. FLASH_CNT

Page 1-6, Low Byte Address = 0x04, Read Only

Bits

Description

[15:0]

Binary counter for writing to flash memory

600

450

300

150

JUNCTION TEMPERATURE (°C)

100

125

135

150

Figure 23. Flash®/EE Memory Data Retention

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