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參數(shù)資料
| 型號： | M37151MA-XXXFP |
| 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 |
| 文件頁數(shù)： | 34/139頁 |
| 文件大?。?/td> | 1491K |
| 代理商： | M37151MA-XXXFP |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
MITSUBISHI MICROCOMPUTERS
M37151M6/M8/MA/MC/MF-XXXFP, M37151EFFP
33
Rev 1.0
8.6.4 I
2
C Control Register
The I
2
C control register (address 00F9
16
) controls the data commu-
nication format.
(1) Bits 0 to 2: bit counter (BC0
–
BC2)
These bits decide the number of bits for the next 1-byte data to be
transmitted. An interrupt request signal occurs immediately after the
number of bits specified with these bits are transmitted.
When a START condition is received, these bits become “000
2
” and
the address data is always transmitted and received in 8 bits.
(2) Bit 3: I
2
C interface use enable bit (ESO)
This bit enables usage of the multimaster I
2
C BUS interface. When
this bit is set to “0,” interface is in the disable status, so the SDA and
the SCL become high-impedance. When the bit is set to “1,” use of
the interface is enabled.
When ESO = “0,” the following is performed.
PIN = “1,” BB = “0” and AL = “0” are set (they are bits of the I
2
C
status register at address 00F8
16
).
Writing data to the I
2
C data shift register (address 00F6
16
) is dis-
abled.
(3) Bit 4: data format selection bit (ALS)
This bit decides whether or not to recognize slave addresses. When
this bit is set to “0,” the addressing format is selected, so that ad-
dress data is recognized. When a match is found between a slave
address and address data as a result of comparison or when a gen-
eral call (refer to “8.6.5 I
2
C Status Register,” bit 1) is received, trans-
mission processing can be performed. When this bit is set to “1,” the
free data format is selected, so that slave addresses are not recog-
nized.
(4) Bit 5: addressing format selection bit (10BIT SAD)
This bit selects a slave address specification format. When this bit is
set to “0,” the 7-bit addressing format is selected. In this case, only
the high-order 7 bits (slave address) of the I
2
C address register (ad-
dress 00F7
16
) are compared with address data. When this bit is set
to “1,” the 10-bit addressing format is selected and all the bits of the
I
2
C address register are compared with the address data.
(5) Bits 6 and 7: connection control bits between
I
2
C-BUS interface and ports
(BSEL0, BSEL1)
These bits control the connection between SCL and ports or SDA
and ports (refer to Figure 8.6.5).
Note:
To connect with SCL3 and SDA3, set bits 2 and 3 of the port P3 register
(00C6
16
) .
Fig. 8.6.5 Connection Port Control by BSEL0 and BSEL1
BSEL0
BSEL1
BSEL0
SCL1/P1
1
SCL2/P1
2
SDA1/P1
3
SDA2/P1
4
BSEL1
SCL
SDA
“1”
“0”
“1”
SCL3/P3
1
SDA3/P3
0
BSEL20
BSEL20
“0”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
BSEL21
BSEL21
“0”
Multi-master
I
2
C-BUS
interface
Notes The paths SCL1, SCL2, SDA1, and SDA2, as well as the paths
SCL3 and SDA3 cannot be connected at the same time.
Port P3 Register (address 00C6
16
) bit 3 is used to control the pin
connections of SCL3/P3
1
and SCL1/P1
1
and those of SDA3/P3
0
and SDA1/P1
3
.
Set the corresponding direction register to "1" to use the port as
multi-master I
2
C-BUS interface.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37151MC | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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| M37151MF-XXXFP | 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 |
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