pcf2123 NXP Semiconductors, pcf2123 Datasheet - Page 42
pcf2123
Manufacturer Part Number
pcf2123
Description
Spi Real Time Clock/calendar
Manufacturer
NXP Semiconductors
Datasheet
1.PCF2123.pdf
(54 pages)
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NXP Semiconductors
PCF2123_1
Product data sheet
Fig 27. SPI-bus timing
WRITE
READ
SDO
SDO
SCL
SDI
SDI
CE
t
su(CE)
R/W
Hi Z
Hi Z
b7
t
SU;DAT
t
HD;DAT
SA2
b6
20%
Rev. 01 — 19 November 2008
t
r
t
t(SDI-SDO)
80%
t
f
RA0
b0
b7
t
d(R)SDO
b7
b6
b6
t
clk(H)
t
t
w(CE)
SCL
t
clk(L)
SPI Real time clock/calendar
t
b0
h(CE)
b0
PCF2123
© NXP B.V. 2008. All rights reserved.
001aai554
t
dis(SDO)
t
42 of 54
rec(CE)
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