Datasheet

PCF2127AT All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 6 — 11 July 2013 74 of 86
NXP Semiconductors
PCF2127AT
Integrated RTC, TCXO and quartz crystal
15. Application information
For information about application configuration, see Ref. 3 “AN10857”.
Fig 52. I
2
C-bus timing diagram; rise and fall times refer to 30 % and 70 %
PROTOCOL
SCL
SDA
mbd820
BIT 0
LSB
(R/W)
START
CONDITION
(S)
BIT 7
MSB
(A7)
BIT 6
(A6)
ACKNOWLEDGE
(A)
STOP
CONDITION
(P)
t
SU;STA
t
HD;STA
t
SU;DAT
t
HD;DAT
t
VD;DAT
t
SU;STO
t
LOW
t
HIGH
1 / f
SCL
t
BUF
t
r
t
f