tsc251g1dxxx-l12ced ATMEL Corporation, tsc251g1dxxx-l12ced Datasheet - Page 54

• Manufacturer Part Number: tsc251g1dxxx-l12ced
• Description: 8/16-bit Microcontroller With Serial Communication Interfaces - 32kbytes Rom
• Manufacturer: ATMEL Corporation

AC Characteristics - SSLC: TWI Interface
Timings
Waveforms
Figure 18. TWI Waveforms
54
(INPUT/OUTPUT)
(INPUT/OUTPUT)
AT/TSC8x251G2D
SDA
SCL
START or Repeated START condition
T
HD
T
;STA
FD
Table 47. TWI Interface AC Timing; V
Notes:
T
T
T
T
T
T
T
Symbol
T
LOW
SU
SU
SU
SU
HD
HD
SU
T
T
T
T
T
; DAT1
; DAT2
; DAT3
T
T
HIGH
; STO
LOW
; STA
; STA
; DAT
BUF
RC
RD
FC
FD
T
T
RD
1. At 100 kbit/s. At other bit-rates this value is inversely proportional to the bit-rate of
2. Determined by the external bus-line capacitance and the external bus-line pull-up
3. Spikes on the SDA and SCL lines with a duration of less than 3·T
4. T
HIGH
T
RC
100 kbit/s.
resistor, this must be < 1 μs.
out. Maximum capacitance on bus-lines SDA and
SCL = 400 pF.
CLCL
T
Parameter
Start condition hold time
SCL low time
SCL high time
SCL rise time
SCL fall time
Data set-up time
SDA set-up time (before repeated START
condition)
SDA set-up time (before STOP condition)
Data hold time
Repeated START set-up time
STOP condition set-up time
Bus free time
SDA rise time
SDA fall time
SU
;DAT1
= T
OSC
T
HD
;DAT
= one oscillator clock period.
T
FC
STOP condition
Repeated START condition
DD
= 2.7 to 5.5 V, T
T
SU
;DAT2
T
14·T
16·T
14·T
1 μs
0.3 μs
250 ns
250 ns
250 ns
0 ns
14·T
14·T
14·T
1 μs
0.3 μs
SU
Min
;DAT3
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
0.3 V
T
T
SU
SU
0.7 V
INPUT
(4)
(4)
(4)
(4)
(4)
(4)
;STA
;STO
DD
A
DD
= -40 to 85°C
Max
T
BUF
START condition
4.0 μs
4.7 μs
4.0 μs
-
0.3 μs
20·T
1 μs
8·T
8·T
4.7 μs
4.0 μs
4.7 μs
0.3 μs
-
0.7 V
(2)
Min
(2)
CLCL
0.3 V
CLCL
CLCL
CLCL
(1)
DD
DD
4135F–8051–11/06
(1)
(1)
(1)
(3)
(1)
(1)
(1)
(3)
OUTPUT
(4)
(4)
will be filtered
(4)
- T
- T
FC
RD
Max