M37212 Mitsubishi, M37212 Datasheet - Page 31

• Manufacturer Part Number: M37212
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
• Manufacturer: Mitsubishi

8.6 MULTI-MASTER I
The multi-master I
cuit, conforming to the Philips I
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
terface and Table 8.6.1 shows multi-master I
tions.
This multi-master I
ister, the I
control register, the I
Fig. 8.6.1 Block Diagram of Multi-master I
Rev. 1.0
Serial
clock
(SCL)
Serial
data
(SDA)
2
C data shift register, the I
2
2
C-BUS interface is a serial communications cir-
C-BUS interface consists of the I
Noise
elimination
circuit
Noise
elimination
circuit
2
C status register and other control circuits.
2
C-BUS INTERFACE
2
C-BUS data transfer format. This
2
C clock control register, the I
Data
control
circuit
Clock
control
circuit
AL
circuit
BB
circuit
M37212M4/M8–XXXSP, M37212M6–XXXSP/FP
2
2
C-BUS Interface
C-BUS interface func-
I
2
b7
C clock control register (S2)
SAD6 SAD5 SAD4 SAD3 SAD2 SAD1 SAD0 RBW
ACK
b7
b7
S0
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
2
C address reg-
ACK
BIT
I
2
2
C-BUS in-
C address register (S0D)
Address comparator
MODE CCR4 CCR3 CCR2 CCR1 CCR0
FAST
I C data shift register
2
2
C
Clock division
Table 8.6.1 Multi-master I
Note : We are not responsible for any third party’s infringement of patent rights
Communication mode
SCL clock frequency
: System clock = f(X
or other rights attributable to the use of the control function (bits 6 and 7
of the I
the I
Format
Item
2
b0
C-BUS interface and ports (SCL1, SCL2, SDA1, SDA2).
b0
2
b0
C control register at address 00DA
System clock
Internal data bus
with ON-SCREEN DISPLAY CONTROLLER
IN
MITSUBISHI MICROCOMPUTERS
)/2
MST TRX BB PIN
BSEL1 BSEL0 10BIT
b7
b7
In conformity with Philips I
standard:
In conformity with Philips I
standard:
16.1 kHz to 400 kHz (at
2
10-bit addressing format
7-bit addressing format
High-speed clock mode
Standard clock mode
Master transmission
Master reception
Slave transmission
Slave reception
I
2
C-BUS Interface Functions
( )
C control register (S1D)
M37212EFSP/FP
Interrupt
generating
circuit
SAD
ALS
Function
16
AL AAS AD0 LRB
ESO
) for connections between
I C status
register
2
Interrupt
request signal
(IICIRQ)
BC2 BC1 BC0
Bit counter
2
2
= 4 MHz)
C-BUS
C-BUS
(S1)
b0
b0
31