EFM32G Data Sheet
Electrical Characteristics
4.15 I2C
Table 4.19. I2C Standard-mode (Sm)
Parameter
Symbol
Min
Typ
Max
Unit
1001
—
SCL clock frequency
fSCL
0
—
kHz
SCL clock low time
tLOW
4.7
4.0
250
8
—
—
—
—
—
—
—
—
µs
µs
ns
ns
µs
µs
µs
µs
SCL clock high time
tHIGH
—
SDA set-up time
tSU,DAT
tHD,DAT
tSU,STA
tHD,STA
tSU,STO
tBUF
—
34502,3
—
SDA hold time
Repeated START condition set-up time
(Repeated) START condition hold time
STOP condition set-up time
4.7
4.0
4.0
4.7
—
—
Bus free time between a STOP and a START
condition
—
Note:
1. For the minimum HFPERCLK frequency required in Standard-mode, see the I2C chapter in the EFM32G Reference Manual.
2. The maximum SDA hold time (tHD,DAT) needs to be met only when the device does not stretch the low time of SCL (tLOW).
3. When transmitting data, this number is guaranteed only when I2Cn_CLKDIV < ((3450*10-9 [s] * fHFPERCLK [Hz]) - 4).
Table 4.20. I2C Fast-mode (Fm)
Parameter
Symbol
Min
Typ
Max
Unit
4001
—
SCL clock frequency
fSCL
0
—
kHz
SCL clock low time
tLOW
1.3
0.6
100
8
—
—
—
—
—
—
—
—
µs
µs
ns
ns
µs
µs
µs
µs
SCL clock high time
tHIGH
—
SDA set-up time
tSU,DAT
tHD,DAT
tSU,STA
tHD,STA
tSU,STO
tBUF
—
9002,3
—
SDA hold time
Repeated START condition set-up time
(Repeated) START condition hold time
STOP condition set-up time
0.6
0.6
0.6
1.3
—
—
Bus free time between a STOP and a START
condition
—
Note:
1. For the minimum HFPERCLK frequency required in Fast-mode, see the I2C chapter in the EFM32G Reference Manual.
2. The maximum SDA hold time (tHD,DAT) needs to be met only when the device does not stretch the low time of SCL (tLOW).
3. When transmitting data, this number is guaranteed only when I2Cn_CLKDIV < ((900*10-9 [s] * fHFPERCLK [Hz]) - 4).
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