NRF51822-CFAB-R7 datasheet(59/130 Pages) NORDIC

部品番号	NRF51822-CFAB-R7

部品情報	Multiprotocol Bluetooth® low energy/2.4 GHz RF System on Chip

PDF	130 Pages

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メーカー	NORDIC [Nordic Semiconductor]

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Page 59

nRF51822 Product Specification v3.3

8.10

I2C compatible Two Wire Interface (TWI) specifications

Table 48 TWI specifications

Figure 14 SCL/SDA timing

Table 49 TWI timing parameters

Symbol

Description

Note

Min.

Typ. Max.

Units

Test

level

I2W100K

Run current for TWI at 100 kbps.

380

μA

I2W400K

Run current for TWI at 400 kbps.

400

μA

f2W

Bit rates for TWI.

100

400

kbps

N/A

tTWI,START

Time from STARTRX/STARTTX task is

given until start condition.

Low power mode.1

Constant latency mode.1

1. For more information on how to control the sub power modes, see the nRF51 Series Reference Manual.

4.4

μs

Symbol

Description

Standard

Min.

Max.

Fast

Min.

Max.

Units

Test

level

fSCL

SCL clock frequency.

100

400

kHz

tHD_STA

Hold time for START and repeated

START condition.

5200

1300

tSU_DAT

Data setup time before positive

edge on SCL.

300

tHD_DAT

Data hold time after negative

edge on SCL.

300

tSU_STO

Setup time from SCL goes high

to STOP condition.

5200

1300

tBUF

Bus free time between STOP and

START conditions.

4700

1300

1/fSCL

SCL

SDA

tHD_SDA

tSU_DAT

tHD_DAT

tBUF

tSU_STO

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