參數(shù)資料
型號(hào)： HMS81C43XX
廠商： Hynix Semiconductor Inc.
英文描述： CMOS SINGLE-CHIP 8-BIT MICROCONTROLLER FOR TELEVISION
中文描述： CMOS單芯片8位單片機(jī)電視
文件頁(yè)數(shù)： 63/100頁(yè)
文件大?。?/td> 1943K
代理商： HMS81C43XX
HMS81C43xx / GMS87C4060
63
November 2001 ver 1.2
18. I
2
C Bus Interface
The I
2
C Bus interface circuit is shown in Figure 18-1 .
The multi-master I
2
C Bus interface is a serial communica-
tions circuit, conforming to the Phlips I
2
C Bus data trans-
fer format. This interface, offering both arbitration lost
detection and a synchronous functions, is useful for the
multi-master serial communications.
This multi-master I
2
C Bus interface circuit consists of the
I
2
C address register, the I
2
C data shift register, the I
2
C
clock control register, the I
2
C control register, the I
2
C sta-
tus register and other control circuits.
The more details about registers are shown Figure 18-2 ~
Figure 18-6 .
Figure 18-1 Block Diagram of multi-master I
2
C circuit
Control
The HMS81C43xx/GMS87C4060 contains two I
2
C Bus
interface modules. It supports multi-master function, so it
contains arbitration lost detection, synchronization func-
tion,etc.
I
2
C address register
It contains slave address (7bit) which is used during slave
mode and Read/Write bit.
Bit 7 ~ 0 : Slave address 6~0
Note:
Bit 7~0 (SAD6~0) store slave address. The address
data transmitted from the master is compared with the con-
tents of these bits.
ICAR [D8
H
]
IFI2CR
Bit counter
SCL
Address
comparator
ICDR [D9
H
]
D7
D6
D5
D4
D3
D2
D1
D0
Interrupt
Generation
Circuit
Data
Control
Circuit
ICSR [00DA
H
]
MST
TRX
BB
PIN
AL
AAS
AD0
LRB
Noise
Elimination
Circuit
AL
Circuit
BB
Circuit
Clock
Control
Circuit
Noise
Elimination
Circuit
ICCR1 [00DB
H
]
BSEL1~0
ALS
ESO
B C 2~0
ICCR2 [DC
H
]
ACLK ACK
1
CC R 3~0
Clock division
External clock
SDA
SAD6 SDA5 SDA4 SDA3 SDA2 SDA1 SDA0 R/W
ITEM
Function
Format
Philips
I
2
C
standard
7bit addressing format
Communication
mode
Master transmitter
Master receiver
Slave transmitter
Slave receiver
SCL clock
frequency
66.6KHz ~ 500KHz (f
ex
=12MHz)
44.4KHz ~ 333.3KHz (f
ex
=8MHz)
ITEM
Function
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