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| 型號(hào)： | M37273MFH-051SP |
| 廠商： | Renesas Technology Corp. |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| 中文描述： | 單芯片8位CMOS微機(jī)隱蔽字幕解碼器和屏幕顯示控制器 |
| 文件頁(yè)數(shù)： | 41/130頁(yè) |
| 文件大?。?/td> | 1663K |
| 代理商： | M37273MFH-051SP |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37273MFH
–
XXXSP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
Fig. 8.6.12 Address Data Communication Format
S
S
l
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s
s
A
D
a
t
a
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a
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A
P
R
“
0
r
t
/
W
7
b
t
r
i
a
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s
n
”
1
a
d
t
t
o
a
8
t
o
b
a
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s
1
c
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i
8
e
r
b
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s
S
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l
a
v
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a
d
d
r
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s
A
D
a
t
a
A
D
a
t
a
A
P
7 bits
“
1
”
1 to 8 bits
1 to 8 bits
(1
)
A
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a
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r
a
n
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r
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S
Slave address
1st 7 bits
b
(3) A master-transmitter transmits data to a slave-receiver with a 10-bit address
A
A
Data
7
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t
s
“
0
”
8
b
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t
s
1
t
o
8
b
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(2) A master-receiver receives data from a slave-transmitter
Slave address
2nd byte
A
D
a
t
a
A/A
P
1
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b
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Data
1
t
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8
b
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S
r
Slave address
1st 7 bits
A
D
a
t
a
A
P
1
t
o
8
b
i
t
s
“
1
”
(4) A master-receiver receives data from a slave-transmitter with a 10-bit address
S : START condition
A : ACK bit
Sr : Restart condition
P : STOP condition
R/W : Read/Write bit
From master to slave
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8.6.12 Precautions when using multi-master
I
2
C-BUS interface
(1) Read-modify-write instruction
The precautions when the raead-modify-write instruction such as SEB,
CLB etc. is executed for each register of the multi-master I
2
C-BUS
interface are described below.
I
2
C data shift register (S0)
When executing the read-modify-write instruction for this register
during transfer, data may become a value not intended.
I
2
C address register (S0D)
When the read-modify-write instruction is executed for this register
at detecting the STOP condition, data may become a value not
intended. It is because hardware changes the read/write bit (RBW)
at the above timing.
I
2
C status register (S1)
Do not execute the read-modify-write instruction for this register
because all bits of this register are changed by hardware.
I
2
C control register (S1D)
When the read-modify-write instruction is executed for this register
at detecting the START condition or at completing the byte transfer,
data may become a value not intended. Because hardware changes
the bit counter (BC0–BC2) at the above timing.
I
2
C clock control register (S2)
The read-modify-write instruction can be executed for this register.
(2) START condition generating procedure us-
ing multi-master
Procedure example (The necessary conditions of the generating
procedure are described as the following
to
).
—
LDA
SEI
BBS 5,S1,BUSBUSY
BUSFREE:
STA S0
LDM #$F0, S1
CLI
(Taking out of slave address value)
(Interrupt disabled)
(BB flag confirming and branch process)
(Writing of slave address value)
(Trigger of START condition generating)
(Interrupt enabled)
BUSBUSY:
CLI
(Interrupt enabled)
Use “STA,” “STX” or “STY” of the zero page addressing instruction
for writing the slave address value to the I
2
C data shift register.
Use “LDM” instruction for setting trigger of START condition gener-
ating.
Write the slave address value of above
and set trigger of START
condition generating of above
continuously shown the above
procedure example.
Disable interrupts during the following three process steps:
BB flag confirming
Writing of slave address value
Trigger of START condition generating
When the condition of the BB flag is bus busy, enable interrupts
immediately.
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參數(shù)描述 |
|---|---|
| M37273MFH-052SP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37273MFH-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37273MF-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37274EFSP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
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