em3027 EM Microelectronic, em3027 Datasheet - Page 23

• Manufacturer Part Number: em3027
• Description: Real-time Clock With I2c Or Spi Interface, Crystal Temperature Compensation, Battery Switchover And Trickle Charger
• Manufacturer: EM Microelectronic

10.2
V
Table 14
Verified by design. Not tested in production
1) Max. bus capacitance on SO line shall be lower than 100pF and 50pF when
2) Spikes on SCK signal shorter than 50ns are suppressed.
Copyright © 2008, EM Microelectronic-Marin SA
07/08 – rev B
SCK Clock Frequency
Data to SCK setup
SCK to Data Hold
SCK to Data Valid
SCK Low Time
SCK High Time
SCK Rise and Fall
CS to SCK Setup
SCK to CS Hold
CS Inactive Time
CS to Output High Impedance
SS
= 0V and T
AC characteristics – SPI
PARAMETER
A
CS
SCK
SI
SO
=-40 to +125°C, unless otherwise specified
t
CC
t
DC
R/W
t
SYMBOL
CDH
.
t
t
t
R
t
t
f
t
t
t
CDH
CDD
t
t
t
CCH
CWL
CH
SCK
CDZ
DC
CL
CH
CC
, t
Figure 9 : Timing - SPI read
F
t
F
t
CL
CONDITIONS
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc ≥ 3.0V
Vcc >1.8V
Vcc >1.3V
Vcc >1.8V
Vcc >1.8V
Vcc >1.8V
Vcc >1.8V
Vcc >1.8V
Vcc >1.8V
Vcc >1.8V
Vcc >1.8V
Vcc >1.8V
Vcc >1.8V
Vcc >1.3V
Vcc >1.3V
Vcc >1.3V
Vcc >1.3V
Vcc >1.3V
Vcc >1.3V
Vcc >1.3V
Vcc >1.3V
Vcc >1.3V
Vcc >1.3V
A6
t
R
23
1500
1500
MIN
200
300
500
400
700
400
700
100
200
300
500
200
300
400
D1
20
Vcc
> 1.8V and
t
CDD
TYP
t
D0
CCH
MAX
1300
Vcc
600
200
350
650
200
800
100
200
50
1
t
< 1.8V, respectively.
CDZ
www.emmicroelectronic.com
UNITS
MHz
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns