Datasheet

PCF8523 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 17 September 2013 8 of 78
NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
CLOCKOUT and timer registers
0Fh Tmr_CLKOUT_ctrl TAM TBM COF[2:0] TAC[1:0] TBC
10h Tmr_A_freq_ctrl - - - - - TAQ[2:0]
11h Tmr_A_reg T_A[7:0]
12h Tmr_B_freq_ctrl - TBW[2:0] - TBQ[2:0]
13h Tmr_B_reg T_B[7:0]
Table 6. Registers overview
…continued
Bit positions labeled as - are not implemented and will return a 0 when read. Bit T must always be written with logic 0.
Address Register name Bit
7 6 5 4 3 2 1 0