Rainbow Electronics MAXQ2010 - Manual (Page 13)

MAXQ2010
16-Bit Mixed-Signal Microcontroller with LCD
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I 2 C BUS CONTROLLER TIMING (ACTING AS I 2 C SLAVE)
(V DVDD = V AVDD = 2.7V to 3.6V, T A = -40°C to +85°C.) (Figure 4)
STANDARD MODE FAST MODE
PARAMETER SYMBOL
MIN MAX MIN MAX
UNITS
System Frequency f SYS 0.9 3.60 MHz
Operating Frequency f I2C f SYS /8 f SYS /8 Hz
System Clock Period t SYS 1/f I2C 1/f I2C μs
Hold Time After (Repeated)
START
t HD:STA 3t SYS 3t SYS μs
Clock Low Period t LOW_I2C 5t SYS 5t SYS μs
Clock High Period t HIGH_I2C 3t SYS 3t SYS μs
Setup Time for Repeated START t SU:STA 5t SYS 5t SYS μs
Hold Time for Data t HD:DAT 0 3.45 0 0.9 μs
Setup Time for Data t SU:DAT 250 100 ns
SDA/SCL Fall Time t F_I2C 300 20 + 0.1C B 300 ns
SDA/SCL Rise Time t R_I2C 1000 20 + 0.1C B 300 ns
Setup Time for STOP t
SU:STO
3t
SYS
3t
SYS
μs
Bus-Free Time Between STOP
and START
t BUF 5t SYS 5t SYS μs
Capacitive Load for Each Bus
Line
C B 400 400 pF
Noise Margin at the Low Level
for Each Connected Device
(Including Hysteresis)
V NL_I2C 0.1 x V DVDD 0.1 x V DVDD V
Noise Margin at the High Level
for Each Connected Device
(Including Hysteresis)
V NH_I2C 0.2 x V DVDD 0.2 x V DVDD V
SDA
SCL
S SR P S
t F_I2C t R_I2C
t LOW
t HIGH t HD:STA
t SU:DAT t SU:STA
t SU:STO
t BUF
t HD:DAT
NOTE: TIMING REFERENCED TO V IH_I2C(MIN) AND V IL_I2C(MAX) .
Figure 4. I 2 C Bus Controller Timing Diagram