ADIS16501SLASHPCBZ datasheet(41/45 Pages) AD

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Data Sheet

ADIS16501

USER REGISTER DEFINITIONS

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Rev. B | 41 of 45

information. For nonvolatile storage, use the manual flash memory

update command (Register GLOB_CMD, Bit 3, see Table 113) after

writing information to these registers.

Flash Memory Endurance Counter

(FLSHCNT_LOW and FLSHCNT_HIGH)

Table 130. FLSHCNT_LOW Register Definition

Addresses

Default

Access

Flash Backup

0x7C, 0x7D

Not applicable

Table 131. FLSHCNT_LOW Bit Definitions

Bits

Description

[15:0]

Flash memory write counter, low word

Table 132. FLSHCNT_HIGH Register Definition

Addresses

Default

Access

Flash Backup

0x7E, 0x7F

Not applicable

Table 133. FLSHCNT_HIGH Bit Definitions

Bits

Description

[15:0]

Flash memory write counter, high word

The FLSHCNT_LOW (see Table 130 and Table 131) and

FLSHCNT_HIGH (see Table 132 and Table 133) registers combine

to provide a 32-bit, binary counter that tracks the number of flash

memory write cycles. In addition to the number of write cycles, the

flash memory has a finite service lifetime, which depends on the

junction temperature. Figure 60 provides guidance for estimating

the retention life for the flash memory at specific junction tempera-

tures. The junction temperature is approximately 7°C above the

case temperature.

Figure 60. Flash Memory Retention

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