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OMAP-L138_10 Datasheet, PDF (178/268 Pages) Texas Instruments – Low-Power Applications Processor
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OMAP-L138 Low-Power Applications Processor
SPRS586A – JUNE 2009 – REVISED AUGUST 2009
www.ti.com
6.17.3 I2C Electrical Data/Timing
6.17.3.1 Inter-Integrated Circuit (I2C) Timing
Table 6-78 and Table 6-79 assume testing over recommended operating conditions (see Figure 6-42 and
Figure 6-43).
Table 6-78. Timing Requirements for I2C Input
NO.
PARAMETER
1 tc(SCL)
Cycle time, I2Cx_SCL
2 tsu(SCLH-SDAL) Setup time, I2Cx_SCL high before I2Cx_SDA low
3 th(SCLL-SDAL) Hold time, I2Cx_SCL low after I2Cx_SDA low
4 tw(SCLL)
Pulse duration, I2Cx_SCL low
5 tw(SCLH)
Pulse duration, I2Cx_SCL high
6 tsu(SDA-SCLH) Setup time, I2Cx_SDA before I2Cx_SCL high
7
th(SDA-SCLL)
Hold time, I2Cx_SDA after I2Cx_SCL low
8 tw(SDAH)
Pulse duration, I2Cx_SDA high
9 tr(SDA)
Rise time, I2Cx_SDA
10 tr(SCL)
Rise time, I2Cx_SCL
11 tf(SDA)
Fall time, I2Cx_SDA
12 tf(SCL)
Fall time, I2Cx_SCL
13 tsu(SCLH-SDAH) Setup time, I2Cx_SCL high before I2Cx_SDA high
14 tw(SP)
Pulse duration, spike (must be suppressed)
15 Cb
Capacitive load for each bus line
1.2V, 1.1V, 1.0V
Standard Mode
Fast Mode
MIN
MAX
MIN
MAX
10
2.5
4.7
0.6
4
0.6
4.7
1.3
4
0.6
250
100
0
0
0.9
4.7
1.3
1000
20 + 0.1Cb
300
1000
20 + 0.1Cb
300
300
20 + 0.1Cb
300
300
20 + 0.1Cb
300
4
0.6
N/A
0
50
400
400
UNIT
µs
µs
µs
µs
µs
ns
µs
µs
ns
ns
ns
ns
µs
ns
pF
Table 6-79. Switching Characteristics for I2C (1)
NO.
PARAMETER
16 tc(SCL)
Cycle time, I2Cx_SCL
17 tsu(SCLH-SDAL) Setup time, I2Cx_SCL high before I2Cx_SDA low
18 th(SDAL-SCLL) Hold time, I2Cx_SCL low after I2Cx_SDA low
19 tw(SCLL)
Pulse duration, I2Cx_SCL low
20 tw(SCLH)
Pulse duration, I2Cx_SCL high
21 tsu(SDAV-SCLH) Setup time, I2Cx_SDA valid before I2Cx_SCL high
22 th(SCLL-SDAV) Hold time, I2Cx_SDA valid after I2Cx_SCL low
23 tw(SDAH)
Pulse duration, I2Cx_SDA high
28 tsu(SCLH-SDAH) Setup time, I2Cx_SCL high before I2Cx_SDA high
(1) I2C must be configured correctly to meet the timings in Table 6-79.
1.2V, 1.1V, 1.0V
Standard Mode
Fast Mode
MIN
MAX
MIN
MAX
10
2.5
4.7
0.6
4
0.6
4.7
1.3
4
0.6
250
100
0
0
0.9
4.7
1.3
4
0.6
UNIT
µs
µs
µs
µs
µs
ns
µs
µs
µs
178 Peripheral Information and Electrical Specifications
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