Inter-Integrated Circuit (IICV3) Block Description
MC9S12XHY-Family Reference Manual, Rev. 1.01
398
Freescale Semiconductor
12.2
External Signal Description
The IICV3 module has two external pins.
12.2.1
IIC_SCL — Serial Clock Line Pin
This is the bidirectional serial clock line (SCL) of the module, compatible to the IIC bus specification.
12.2.2
IIC_SDA — Serial Data Line Pin
This is the bidirectional serial data line (SDA) of the module, compatible to the IIC bus specification.
12.3
Memory Map and Register Definition
This section provides a detailed description of all memory and registers for the IIC module.
12.3.1
Register Descriptions
This section consists of register descriptions in address order. Each description includes a standard register
diagram with an associated figure number. Details of register bit and field function follow the register
diagrams, in bit order.
Register
Name
Bit 7
6
5
4
3
2
1
Bit 0
0x0000
IBAD
R
ADR7
ADR6
ADR5
ADR4
ADR3
ADR2
ADR1
0
W
0x0001
IBFD
R
IBC7
IBC6
IBC5
IBC4
IBC3
IBC2
IBC1
IBC0
W
0x0002
IBCR
R
IBEN
IBIE
MS/SL
Tx/Rx
TXAK
0
0
IBSWAI
W
RSTA
0x0003
IBSR
R
TCF
IAAS
IBB
IBAL
0
SRW
IBIF
RXAK
W
0x0004
IBDR
R
D7
D6
D5
D4
D3
D2
D1
D0
W
0x0005
IBCR2
R
GCEN
ADTYPE
0
0
0
ADR10
ADR9
ADR8
W
= Unimplemented or Reserved
Figure 12-2. IIC Register Summary
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