PCF2127TSLASH2Y datasheet(16/100 Pages) PHILIPS

16 / 100 page

PCF2127

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Product data sheet

Rev. 8 — 19 December 2014

16 of 100

NXP Semiconductors

PCF2127

Accurate RTC with integrated quartz crystal for industrial applications

8.5.1 Register RAM_addr_MSB

8.5.2 Register RAM_addr_LSB

8.5.3 Register RAM_wrt_cmd

8.5.4 Register RAM_rd_cmd

Table 19.

RAM_addr_MSB - RAM address MSB register (address 1Ah) bit allocation

Bit positions labeled as - are not implemented and return 0 when read.

Bit

Symbol

---

----

RA8

Reset

value

---

----

Table 20.

RAM_addr_MSB - RAM address MSB register (address 1Ah) bit description

Bit positions labeled as - are not implemented and return 0 when read.

Bit

Symbol

Description

7 to 1

unused

RA8

RAM address, MSB (9th bit)

Table 21.

RAM_addr_LSB - RAM address LSB register (address 1Bh) bit allocation

Bit

Symbol

RA[7:0]

Reset

value

000

0000

Table 22.

RAM_addr_LSB - RAM address LSB register (address 1Bh) bit description

Bit

Symbol

Description

7 to 0

RA[7:0]

RAM address, LSB (1st to 8th bit)

Table 23.

RAM_wrt_cmd - RAM write command register (address 1Ch) bit description

Bit

Symbol

Description

7 to 0

data to be written into RAM

Table 24.

RAM_rd_cmd - RAM read command register (address 1Dh) bit description

Bit

Symbol

Description

7 to 0

data to be read from RAM

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