參數(shù)資料
型號： M37212M8
廠商： Mitsubishi Electric Corporation
英文描述： Single Chip 8 Bits Microcomputer(8位單片機)
中文描述： 單芯片8位單片機（8位單片機）
文件頁數(shù)： 31/119頁
文件大小： 1308K
代理商： M37212M8
31
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
M37212M4/M8–XXXSP, M37212M6–XXXSP/FP
M37212EFSP/FP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
Function
In conformity with Philips I
2
C-BUS
standard:
10-bit addressing format
7-bit addressing format
High-speed clock mode
Standard clock mode
In conformity with Philips I
2
C-BUS
standard:
Master transmission
Master reception
Slave transmission
Slave reception
16.1 kHz to 400 kHz (at
φ
= 4 MHz)
Table 8.6.1 Multi-master I
2
C-BUS Interface Functions
Item
Format
Communication mode
SCL clock frequency
φ
System clock = f(X
IN
)/2
Note :
We are not responsible for any third party’s infringement of patent rights
or other rights attributable to the use of the control function (bits 6 and 7
of the I
2
C control register at address 00DA
16
) for connections between
the I
2
C-BUS interface and ports (SCL1, SCL2, SDA1, SDA2).
8.6 MULTI-MASTER I
2
C-BUS INTERFACE
The multi-master I
2
C-BUS interface is a serial communications cir-
cuit, conforming to the Philips I
2
C-BUS data transfer format. This
interface, offering both arbitration lost detection and a synchronous
functions, is useful for the multi-master serial communications.
Figure 8.6.1 shows a block diagram of the multi-master I
2
C-BUS in-
terface and Table 8.6.1 shows multi-master I
2
C-BUS interface func-
tions.
This multi-master I
2
C-BUS interface consists of the I
2
C address reg-
ister, the I
2
C data shift register, the I
2
C clock control register, the I
2
C
control register, the I
2
C status register and other control circuits.
Fig. 8.6.1 Block Diagram of Multi-master I
2
C-BUS Interface
I
2
C address register (S0D)
b7
b0
SAD6 SAD5 SAD4 SAD3 SAD2 SAD1SAD0 RBW
Noise
elimination
circuit
Serial
data
(SDA)
Address comparator
b7
I C data shift register
b0
Data
control
circuit
I
2
C clock control register (S2)
System clock
(
φ
)
Interrupt
generating
circuit
Interrupt
request signal
(IICIRQ)
b7
MST TRX BB
PIN
AL
AAS AD0 LRB
b0
I C status
register
(S1)
b7
BSEL1 BSEL0
SAD
b0
ALS
BC2 BC1 BC0
I
2
C control register (S1D)
Bit counter
BB
circuit
Clock
control
circuit
Noise
elimination
circuit
Serial
clock
(SCL)
b7
b0
ACK
ACK
BIT
FAST
Internal data bus
Clock division
S0
AL
circuit
ESO
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