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参数资料
| 型号： | M37161MF-XXXSP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42 |
| 文件页数： | 57/129页 |
| 文件大小： | 1092K |
| 代理商： | M37161MF-XXXSP |
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Rev.1.00
2003.11.25
page 33 of 128
M37161M8/MA/MF-XXXSP/FP,M37161EFSP/FP
8.6.4 I2C Control Register
The I2C control register (address 00F916) 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 “0002” and
the address data is always transmitted and received in 8 bits.
(2) Bit 3: I2C interface use enable bit (ESO)
This bit enables usage of the multimaster I2C BUS interface. When
this bit is set to “0,” interface is in the disabled 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 I2C
status register at address 00F816 ).
Writing data to the I2C data shift register (address 00F616) 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 I2C 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 I2C address register (ad-
dress 00F716) 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
I2C address register are compared with the address data.
(5) Bits 6 and 7: connection control bits between
I2C-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
(00C616) .
Fig. 8.6.5 Connection Port Control by BSEL0 and BSEL1
BSEL0
BSEL1
BSEL0
SCL1/P11
SCL2/P12
SDA1/P13
SDA2/P14
BSEL1
SCL
SDA
“1”
“0”
“1”
SCL3/P31
SDA3/P30
BSEL20
“0”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
“0”
“1”
BSEL21
“0”
Multi-master
I2C-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 00C616) bit 3 is used to control the pin
connections of SCL3/P31 and SCL1/P11 and those of SDA3/P30 and SDA1/P13.
Set the corresponding direction register to "1" to use the port as
multi-master I
2C-BUS interface.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M3720 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:1 KEY 1 SOUND |
| M3720-1 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:1 KEY 1 SOUND |
| M3720-10 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:1 KEY 1 SOUND |
| M3720-2 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:1 KEY 1 SOUND |
| M3720-3 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:1 KEY 1 SOUND |
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