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参数资料
| 型号： | M37221MAH-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： | 51/112页 |
| 文件大小： | 1207K |
| 代理商： | M37221MAH-XXXSP |
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43
Rev. 1.0
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
M37221M4H/M6H/M8H/MAH–XXXSP/FP
M37221EASP/FP
MITSUBISHI MICROCOMPUTERS
(3) RESTART condition generation procedure
Procedure example (The necessary conditions for the procedure
are described in to below.)
Execute the following procedure when the PIN bit is “0.”
LDM
#$00, S1
(Select slave receive mode)
LDA
—
(Take out slave address value)
SEI
(Interrupt disabled)
STA
S0
(Write slave address value)
LDM
#$F0, S1
(Trigger RESTART condition generation)
CLI
(Interrupt enabled)
Select the slave receive mode when the PIN bit is “0.” Do not write
“1” to the PIN bit. Neither “0” nor “1” is specified for the writing to
the BB bit.
The TRX bit becomes “0” and the SDA pin is released.
The SCL pin is released by writing the slave address value to the
I2C data shift register. Use “STA,” “STX” or “STY” of the zero page
addressing instruction for writing.
{ Use “LDM” instruction for setting trigger of RESTART condition
generation.
Write the slave address value of and set trigger of RESTART
condition generation of continuously, as shown in the procedure
example.
Disable interrupts during the following two process steps:
Write slave address value
Trigger RESTART condition generation
(4) STOP condition generation procedure
Procedure example (The necessary conditions for the procedure
are described in to below.)
SEI
(Interrupt disabled)
LDM #$C0, S1
(Select master transmit mode)
NOP
(Set NOP)
LDM #$D0, S1
(Trigger STOP condition generation)
CLI
(Interrupt enabled)
Write “0” to the PIN bit when master transmit mode is selected.
Execute “NOP” instruction after master transmit mode is set. Also,
set trigger of STOP condition generation within 10 cycles after se-
lecting the master trasmit mode.
{ Disable interrupts during the following two process steps:
Select master transmit mode
Trigger STOP condition generation
(5) Writing to I2C status register
Do not execute an instruction to set the PIN bit to “1” from “0” and an
instruction to set the MST and TRX bits to “0” from “1” simultaneously
as it may cause the SCL pin the SDA pin to be released after about
one machine cycle. Also, do not execute an instruction to set the
MST and TRX bits to “0” from “1” when the PIN bit is “1,” as it may
cause the same problem.
(6) Process after STOP condition generation
Do not write data in the I2C data shift register S0 and the I2C status
register S1 until the bus busy flag BB becomes “0” after generation
the STOP condition in the master mode. Doing so may cause the
STOP condition waveform from being generated normally. Reading
the registers does not cause the same problem.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| M37225ECSP | 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 |
| M37225M6 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
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