ADIS16505-2SLASHPCBZ datasheet(37/41 Pages) AD

37 / 41 page

Data Sheet

ADIS16505

Rev. C | Page 37 of 41

Flash Memory Endurance Counter (FLSHCNT_LOW and

FLSHCNT_HIGH)

Table 129. FLSHCNT_LOW Register Definition

Addresses

Default

Access

Flash Backup

0x7C, 0x7D

Not applicable

Yes

Table 130. FLSHCNT_LOW Bit Definitions

Bits

Description

[15:0]

Flash memory write counter, low word

Table 131. FLSHCNT_HIGH Register Definition

Addresses

Default

Access

Flash Backup

0x7E, 0x7F

Not applicable

Yes

Table 132. FLSHCNT_HIGH Bit Definitions

Bits

Description

[15:0]

Flash memory write counter, high word

The FLSHCNT_LOW (see Table 129 and Table 130) and

FLSHCNT_HIGH (see Table 131 and Table 132) 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 temperatures. The junction

temperature is approximately 7°C above the case temperature.

600

450

300

150

JUNCTION TEMPERATURE (°C)

100

125

135

150

Figure 60. Flash Memory Retention

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