MB90800_08 Datasheet, PDF (31/92 Pages) Fujitsu Component Limited. – 16-bit Microcontroller

MB90800 Series
3. I²C Interface
I²C interface is the serial input/output port that support Inter IC BUS and functions as the master/slave device
on the I²C bus. MB90800 series have 1 channel of the built-in I²C interface.
It has the features of I²C interface below.
• Master/slave sending and receiving
• Arbitration function
• Clock synchronization function
• Slave address and general call address detection function
• Detecting transmitting direction function
• Repeat generating and detecting function of the start conditions
• Bus error detection function
• The forwarding rate can be supported to 100 kbps.
(1) Register list
I²C status register (IBSR)
bit
7
Address :00006AH
BB
R
I²C control register (IBCR)
bit ₁₅
Address :00006BH
BER
R/W
I²C clock control register (ICCR)
bit
Address :00006CH
7
⎯
⎯
I²C data register(IDAR)
bit
Address :00006EH
15
D7
R/W
I²C address register (IADR)
bit
Address :00006DH
7
⎯
⎯
- : Unused
6
RSC
R
14
BEIE
R/W
6
⎯
⎯
14
D6
R/W
6
A6
R/W
5
AL
R
13
SCC
R/W
5
EN
R/W
13
D5
R/W
5
A5
R/W
4
LRB
R
12
MSS
R/W
4
CS4
R/W
12
D4
R/W
4
A4
R/W
3
TRX
R
2
AAS
R
1
GCA
R
11
ACK
R/W
10
GCAA
R/W
9
INTE
R/W
3
2
1
CS3 CS2 CS1
R/W R/W R/W
11
10
9
D3
D2
D1
R/W R/W R/W
3
2
1
A3
A2
A1
R/W R/W R/W
0
FBT
R
8
INT
R/W
0
CS0
R/W
8
D0
R/W
0
A0
R/W
Initial Value
00000000B
Read/Write
Initial Value
00000000B
Read/Write
Initial Value
XX0XXXXXB
Read/Write
Initial Value
XXXXXXXXB
Read/Write
Initial Value
XXXXXXXXB
Read/Write
DS07-13733-3E
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