MC68HC05T16 Datasheet, PDF (120/128 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit

14.6
M-Bus Interface Timing
Table 14-4 M-Bus Interface Input Signal Timing
(V_DD=5.0Vdc ±10%, V_SS=0Vdc, temperature range=0 to 70°C)
PARAMETERS
SYMBOL MINIMUM
START condition hold time
START condition setup time
(for repeated START condition only)
t_HD.STA
2
t_SU.STA
2
SCL clock low period
SCL clock high period
SDA data setup time
SDA data hold time
STOP condition setup time
t_LOW
4.7
t_HIGH
4.0
t_SU.DAT
250
t_HD.DAT
0
t_SU.STO
2
MAXIMUM
–
–
–
–
–
–
–
UNIT
t_CYC
t_CYC
t_CYC
t_CYC
µs
µs
t_CYC
Table 14-5 M-Bus Interface Output Signal Timing
(V_DD=5.0Vdc ±10%, V_SS=0Vdc, temperature range=0 to 70°C)
CHARACTERISTICS
SYMBOL MINIMUM
START condition hold time
START condition setup time
(for repeated START condition only)
t_HD.STA
8
t_SU.STA
10
SCL clock low period
SCL clock high period
SDA/SCL rise time (see note 1)
SDA/SCL fall time (see note 1)
SDA data setup time
SDA data hold time
STOP condition setup time
Note:
t_LOW
t_HIGH
t_R
t_F
t_SU.DAT
t_HD.DAT
t_SU.STO
11
11
–
–
t_LOW - 2t_CYC
170
10
MAXIMUM
–
–
–
–
1
300
–
–
–
UNIT
t_CYC
t_CYC
t_CYC
t_CYC
µs
ns
µs
ns
t_CYC
1. With 200pF loading on the SDA/SCL pins
14
SDA
t_F
t_R
SCL
t_HD.STA t_LOW
t_HIGH
t_SU.DAT t_HD.DAT
t_SU.STA
Figure 14-1 M-Bus Timing Diagram
MOTOROLA
14-4
ELECTRICAL SPECIFICATIONS
t_SU.STO
TPG
MC68HC05T16