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| 型号： | M37221M8H-XXXSP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42 |
| 文件页数： | 49/112页 |
| 文件大小： | 1179K |
| 代理商： | M37221M8H-XXXSP |
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M37221M4H/M6H/M8H/MAH–XXXSP/FP M37221EASP/FP
Rev.1.00
Oct 01, 2002
page 41 of 110
REJ03B0134-0100Z
8.6.10 Example of Master Transmission
An example of master transmission in the standard clock mode, at
the SCL frequency of 100 kHz with the ACK return mode enable, is
shown below.
Set a slave address in the high-order 7 bits of the I2C address
register (address 00D816) and “0” in the RBW bit.
Set the ACK return mode and SCL = 100 kHz by setting “8516” in
the I2C clock control register (address 00DB16).
Set “1016” in the I2C status register (address 00D916) and hold the
SCL at HIGH.
④ Set a communication enable status by setting “4816” in the I2C
control register (address 00DA16).
Set the address data of the destination of transmission in the high-
order 7 bits of the I2C data shift register (address 00D716) and set
“0” in the least significant bit.
⑥ Set “F016” in the I2C status register (address 00D916) to generate
a START condition. At this time, an SCL for 1 byte and an ACK
clock automatically occurs.
⑦ Set transmit data in the I2C data shift register (address 00D716). At
this time, an SCL and an ACK clock automatically occurs.
When transmitting control data of more than 1 byte, repeat step .
Set “D016” in the I2C status register (address 00D916). After this, if
ACK is not returned or transmission ends, a STOP condition will
be generated.
8.6.11 Example of Slave Reception
An example of slave reception in the high-speed clock mode, at the
SCL frequency of 400 kHz, with the ACK non-return mode enabled
while using the addressing format, is shown below.
Set a slave address in the high-order 7 bits of the I2C address
register (address 00D816) and “0” in the RBW bit.
Set the ACK non-return mode and SCL = 400 kHz by setting “2516”
in the I2C clock control register (address 00DB16).
Set “1016” in the I2C status register (address 00D916) and hold the
SCL at HIGH.
④ Set a communication enable status by setting “4816” in the I2C
control register (address 00DA16).
When a START condition is received, an address comparison is
executed.
⑥ When all transmitted address are“0” (general call):
AD0 of the I2C status register (address 00D916) is set to “1” and
an interrupt request signal occurs.
When the transmitted addresses match the address set in :
ASS of the I2C status register (address 00D916) is set to “1” and
an interrupt request signal occurs.
In the cases other than the above:
AD0 and AAS of the I2C status register (address 00D916) are set
to “0” and no interrupt request signal occurs.
⑦ Set dummy data in the I2C data shift register (address 00D716).
When receiving control data of more than 1 byte, repeat step .
When a STOP condition is detected, the communication ends.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M37221MAH-XXXFP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37221MAH-XXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37224M3 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37224M3-050SP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37224M3-XXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
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