ST7263BEX datasheet(120/186 Pages) STMICROELECTRONICS

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On-chip peripherals

ST7263Bxx

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Doc ID 7516 Rev 8

3 BTF Byte transfer finished.

This bit is set by hardware as soon as a byte is correctly received or transmitted

with interrupt generation if ITE=1. It is cleared by software reading SR1 register

followed by a read or write of DR register. It is also cleared by hardware when the

interface is disabled (PE=0).

Following a byte transmission, this bit is set after reception of the acknowledge

clock pulse. In case an address byte is sent, this bit is set only after the EV6 event

(See Figure 48). BTF is cleared by reading SR1 register followed by writing the next

byte in DR register.

Following a byte reception, this bit is set after transmission of the acknowledge

clock pulse if ACK=1. BTF is cleared by reading SR1 register followed by reading

the byte from DR register.

The SCL line is held low while BTF=1.

0: Byte transfer not done

1: Byte transfer succeeded

2 ADSL Address matched (Slave mode). This bit is set by hardware as soon as the

received slave address matched with the OAR register content or a general call is

recognized. An interrupt is generated if ITE=1. It is cleared by software reading SR1

The SCL line is held low while ADSL=1.

0: Address mismatched or not received

1: Received address matched

1 M/SL Master/Slave.

This bit is set by hardware as soon as the interface is in Master mode (writing

START=1). It is cleared by hardware after detecting a Stop condition on the bus or a

loss of arbitration (ARLO=1). It is also cleared when the interface is disabled

(PE=0).

0: Slave mode

1: Master mode

0 SB Start bit (Master mode).

This bit is set by hardware as soon as the Start condition is generated (following a

write START=1). An interrupt is generated if ITE=1. It is cleared by software reading

SR1 register followed by writing the address byte in DR register. It is also cleared by

hardware when the interface is disabled (PE=0).

0: No Start condition

1: Start condition generated

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