參數(shù)資料
型號(hào)： M37221M6-XXXSP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42
封裝： 0.600 INCH, PLASTIC, SDIP-42
文件頁(yè)數(shù)： 49/113頁(yè)
文件大?。?/td> 1254K
代理商： M37221M6-XXXSP
40
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
M37221M4/M8/MA–XXXSP, M37221M6–XXXSP/FP
M37221EASP/FP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
8.6.8 START/STOP Condition Detect Conditions
The START/STOP condition detect conditions are shown in
Figure 8.6.11 and Table 8.6.3. Only when the 3 conditions of Table
8.6.3 are satisfied, a START/STOP condition can be detected.
Note: When a STOP condition is detected in the slave mode
(MST = 0), an interrupt request signal “IICIRQ” is generated to the
CPU.
Fig. 8.6.11 START Condition/STOP Condition Detect Timing Dia-
gram
Standard Clock Mode
6.5
s (26 cycles) < SCL
release time
3.25
s (13 cycles) < Setup time
3.25
s (13 cycles) < Hold time
High-speed Clock Mode
1.0
s (4 cycles) < SCL
release time
0.5
s (2 cycles) < Setup time
0.5
s (2 cycles) < Hold time
Table 8.6.3 START Condition/STOP Condition Detect Conditions
Note: Absolute time at
φ = 4 MHz. The value in parentheses denotes the num-
ber of
φ cycles.
Hold time
Setup
time
SCL
SDA
(START condition)
SDA
(STOP condition)
SCL release time
Hold time
Setup
time
8.6.9 Address Data Communication
There are two address data communication formats, namely, 7-bit
addressing format and 10-bit addressing format. The respective ad-
dress communication formats is described below.
(1) 7-bit addressing format
To meet the 7-bit addressing format, set the 10BIT SAD bit of the I2C
control register (address 00DA16) to “0.” The first 7-bit address data
transmitted from the master is compared with the high-order 7-bit
slave address stored in the I2C address register (address 00D816).
At the time of this comparison, address comparison of the RBW bit of
the I2C address register (address 00D816) is not made. For the data
transmission format when the 7-bit addressing format is selected,
refer to Figure 8.6.12, (1) and (2).
(2) 10-bit addressing format
To meet the 10-bit addressing format, set the 10BIT SAD bit of the
I2C control register (address 00DA16) to “1.” An address comparison
is made between the first-byte address data transmitted from the
master and the 7-bit slave address stored in the I2C address register
(address 00D816). At the time of this comparison, an address com-
parison between the RBW bit of the I2C address register (address
00D816) and the R/W bit which is the last bit of the address data
transmitted from the master is made. In the 10-bit addressing mode,
the R/W bit which is the last bit of the address data not only specifies
the direction of communication for control data but also is processed
as an address data bit.
When the first-byte address data matches the slave address, the
AAS bit of the I2C status register (address 00D916) is set to “1.” After
the second-byte address data is stored into the I2C data shift register
(address 00D716), make an address comparison between the sec-
ond-byte data and the slave address by software. When the address
data of the 2nd bytes matches the slave address, set the RBW bit of
the I2C address register (address 00D816) to “1” by software. This
processing can match the 7-bit slave address and R/W data, which
are received after a RESTART condition is detected, with the value
of the I2C address register (address 00D816). For the data transmis-
sion format when the 10-bit addressing format is selected, refer to
Figure 8.6.12, (3) and (4).
相關(guān)PDF資料
PDF描述
M37221M6H-XXXFP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDSO42
M37221EASP 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP42
M37221M4H-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42
M37221M8H-XXXFP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDSO42
M37221M6H-XXXSP 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37221M8H 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37221M8H-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37221M8H-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37221MAH-XXXFP 制造商:RENESAS 制造商全稱: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 制造商全稱: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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