NXP Semiconductors
PCF8523
Real-Time Clock (RTC) and calendar
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
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
TIMER_A_VALUE[7:0]
12h
Tmr_B_freq_ctrl
-
TBW[2:0]
-
TBQ[2:0]
13h
Tmr_B_reg
TIMER_B_VALUE[7:0]
PCF8523
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 5 July 2012
© NXP B.V. 2012. All rights reserved.
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