PCF8523 NXP [NXP Semiconductors], PCF8523 Datasheet - Page 51

• Manufacturer Part Number: PCF8523
• Description: Real-Time Clock (RTC) and calendar
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
13. Application information
PCF8523
Product data sheet
Fig 34. I
Fig 35. Application diagram
R
the battery is not guaranteed.
2
1
C-bus timing diagram; rise and fall times refer to 30 % and 70 %
and C
protocol
SDA
SCL
1
are recommended to limit the Slew Rate (SR, see
R 1
C 1
t
SU;STA
V
OSCI
OSCO
t
BUF
BAT
condition
START
(S)
t
HD;STA
V
DD
V
t
LOW
SS
t
r
CLKOUT
All information provided in this document is subject to legal disclaimers.
INT1/
MSB
bit 7
(A7)
PCF8523
t
HIGH
Rev. 3 — 30 March 2011
t
SU;DAT
CLKOUT
t
f
1
/f
bit 6
(A6)
SCL
t
HD;DAT
INT2
Table
SDA
SCL
46) of V
(R/W)
bit 0
t
VD;DAT
DD
acknowledge
. If V
Real-Time Clock (RTC) and calendar
(A)
DD
drops to fast, the internal supply switch to
t
SCL
SDA
VD;ACK
V
R
DD
TRANSMITTER
condition
R
STOP
RECEIVER
(P)
MASTER
V
t
R =
R: pull-up resistor
SU;STO
SS
013aaa417
C
V
t
r
b
DD
013aaa341
PCF8523
© NXP B.V. 2011. All rights reserved.
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