GENERAL RELEASE SPECIFICATION
August 27, 1998
18.10 SM-BUS DC ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Min
Max
Unit
V
LOW level input voltage
HIGH level input voltage
V
V
0.3 x V
IL
SS
DD
V
0.7 x V
5.5
V
IH
DD
LOW level output voltage (open drain); at 2.86mA sink current
(R =1.7kΩ and C =400pF)
V
V
0.135
V
OL
SS
PULLUP
LOAD
NOTES:
1.
V
=5V ± 10%, V = 0 V, T ≤ T ≤ T , unless otherwise noted.
SS L A H
DD
2. For SM-Bus specification: logic "LOW"=0.6V or less; logic "HIGH"=1.4V or above.
18.11 SM-BUS CONTROL TIMING
18.11.1SM-Bus Interface Input Signal Timing
Parameter
Start condition hold time
Clock low period
Symbol
Min
2
Max
—
Unit
t
t
HD.STA
CYC
t
4.7
—
300
—
4
—
t
LOW
CYC
SDA/SCL rise time
t
1
µs
R
Data hold time
t
t
—
ns
ns
HD.DAT
SDA/SCL fall time
t
300
—
F
Clock high period
t
t
HIGH
SU.DAT
CYC
Data set up time
250
2
—
ns
Start condition set up time (for repeated start condition only)
Stop condition set up time
t
—
t
t
SU.STA
SU.STO
CYC
CYC
t
2
—
NOTES:
1.
V
=5V ± 10%, V = 0 V, T ≤ T ≤ T , unless otherwise noted.
DD SS L A H
18.11.2SM-Bus Interface Output Signal Timing
Parameter
Start condition hold time
Clock low period
Symbol
Min
8
Max
—
Unit
t
t
HD.STA
CYC
t
11
—
—
t
LOW
CYC
SDA/SCL rise time
t
1
µs
R
Data hold time
t
t
300
—
—
ns
ns
HD.DAT
SDA/SCL fall time
t
300
—
F
Clock high period
t
11
t
HIGH
SU.DAT
CYC
Data set up time
t
–t
—
ns
LOW CYC
Start condition set up time (for repeated start condition only)
t
10
10
—
t
t
SU.STA
SU.STO
CYC
CYC
Stop condition set up time
NOTES:
t
—
1.
V
=5V ± 10%, V = 0 V, T ≤ T ≤ T , unless otherwise noted.
DD SS L A H
MOTOROLA
18-8
ELECTRICAL SPECIFICATIONS
MC68HC05SB7
REV 2.1
FREESCALE [ Freescale ]
