ST7LITE49M datasheet(120/188 Pages) STMICROELECTRONICS

120 / 188 page

On-chip peripherals

ST7LITE49M

120/188

11.4.7

I2C Control register (CR)

Reset value: 0000 0000 (00h)

Bit 7:6 = Reserved. Forced to 0 by hardware.

Bit 5 = PE Peripheral Enable bit

This bit is set and cleared by software.

0: Peripheral disabled

1: Master/Slave capability

Note:

When PE=0, all the bits of the CR register and the SR register except the Stop bit are reset.

All outputs are released while PE=0

When PE=1, the corresponding I/O pins are selected by hardware as alternate functions.

To enable the I2C interface, write the CR register TWICE with PE=1 as the first write only

activates the interface (only PE is set).

Bit 4 = ENGC Enable General Call bit

This bit is set and cleared by software. It is also cleared by hardware when the interface

is disabled (PE=0). The 00h General Call address is acknowledged (01h ignored).

0: General Call disabled

1: General Call enabled

Note:

In accordance with the I2C standard, when GCAL addressing is enabled, an I2C slave can

only receive data. It will not transmit data to the master.

Bit 3 = START Generation of a Start condition bit. This bit is set and cleared by software. It

is also cleared by hardware when the interface is disabled (PE=0) or when the Start

condition is sent (with interrupt generation if ITE=1).

●

In master mode:

0: No start generation

1: Repeated start generation

●

In slave mode:

0: No start generation

1: Start generation when the bus is free

Bit 2 = ACK Acknowledge enable bit

This bit is set and cleared by software. It is also cleared by hardware when the interface

is disabled (PE=0).

0: No acknowledge returned

1: Acknowledge returned after an address byte or a data byte is received

ENGC

START

ACK

STOP

ITE

Read / Write

ST7LITE49M Fiches technique(PDF) 120 Page - STMicroelectronics

ST7LITE49M Fiches technique(HTML) 120 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Fiches technique Télécharger

Lien URL