Fujitsu 8FX User Manual

MB95630H Series
MN702-00009-2v0-E FUJITSU SEMICONDUCTOR LIMITED 523
CHAPTER 24 I
2
C BUS INTERFACE
24.7 Registers
[bit1] GCA: General call address detection bit
This bit detects a general call address.
If one of the following conditions is satisfied, this bit is set to "1".
• The device receives a general call address (0x00) in slave mode.
• With IBCR1n:GACKE set to "1", the device receives a general call address (0x00) in master mode.
• In master mode, an arbitration lost is detected during the transmission of the second byte of a general call
address.
If one of the following conditions is satisfied, this bit is set to "0".
• A START condition or a STOP condition is detected.
• In master mode, no arbitration lost is detected during the transmission of the second byte of a general call
address.
[bit0] FBT: First byte detection bit
This bit detects the first byte.
This bit is set to "1" when a START condition is detected.
If one of the following conditions is satisfied, this bit is set to "0".
• "0" is written to the IBCR1n:INT bit.
• In slave mode, the slave address does not match the address set in the IAARn register.
• In slave mode, the slave address matches the address set in the IAARn register, but the IBCR0n:AACKX bit
is "1".
• In slave mode, the device receives a general call address, but the IBCR1n:GACKE bit is "0".
bit1 Details
Reading "0"
Indicates that the I
2
C bus interface has not received a general call address (0x00) in slave mode.
Reading "1"
Indicates that the I
2
C bus interface has received a general call address (0x00) in slave mode.
bit0 Details
Reading "0" Indicates that the receive data is not the first byte in data reception.
Reading "1" Indicates that the receive data is the first byte (address) in data reception.

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English