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| 型号： | M37270EF-XXXSP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, OTPROM, 8.1 MHz, MICROCONTROLLER, PDIP64 |
| 封装： | 0.750 INCH, 1.78 MM PITCH, PLASTIC, SDIP-64 |
| 文件页数： | 14/97页 |
| 文件大小： | 1359K |
| 代理商： | M37270EF-XXXSP |
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MITSUBISHI MICROCOMPUTERS
M37270MF-XXXSP
M37270EF-XXXSP, M37270EFSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
18
Fig. 11. Structure of serial I/O mode register
Internal clock—the serial I/O counter is set to “7” during write cycle
into the serial I/O register (address 021416), and transfer clock goes
“H” forcibly. At each falling edge of the transfer clock after the write
cycle, serial data is output from the SOUT pin. Transfer direction can
be selected by bit 5 of the serial I/O mode register. At each rising
edge of the transfer clock, data is input from the SIN pin and data in
the serial I/O register is shifted 1 bit.
After the transfer clock has counted 8 times, the serial I/O counter
becomes “0” and the transfer clock stops at “H.” At this time the inter-
rupt request bit is set to “1.”
External clock—when an external clock is selected as the clock
source, the interrupt request is set to “1” after the transfer clock has
counted 8 times. However, transfer operation does not stop, so con-
trol the clock externally. Use the external clock of 500kHz or less
with a duty cycle of 50%.
The serial I/O timing is shown in Figure 10. When using an external
clock for transfer, the external clock must be held at “H” for initializing
the serial I/O counter. When switching between an internal clock and
an external clock, do not switch during transfer. Also, be sure to ini-
tialize the serial I/O counter after switching.
Notes 1: On programming, note that the serial I/O counter is set by
writing to the serial I/O register with the bit managing in-
structions as SEB and CLB instructions.
2: When an external clock is used as the synchronizing clock,
write transmit data to the serial I/O register at “H” of the
transfer clock input level.
Fig. 10. Serial I/O timing (for LSB first)
Synchroninzing clock
Transfer clock
Serial I/O register
write signal
Serial I/O output
SOUT
D0
D1
D2
D3
D4
D5
D6
D7
(Note)
Serial I/O input
SIN
Note : When an internal clock is selected, the SOUT pin is at high-impedance after transfer is completed.
Interrupt request bit is set to “1”
7
Serial I/O mode register
(SM : address 021316)
Internal synchronizing clock
selection bits
b1 b0
0
0 : f(XIN)/8 or f(XCIN)/8
0
1 : f(XIN)/16 or f(XCIN)/16
1
0 : f(XIN)/32 or f(XCIN)/32
1
1 : f(XIN)/64 or f(XCIN)/64
0
Synchronizing clock selection bit
0 : External clock
1 : Internal clock
Port function selection bit
0 : P11, P13 functions as port
1 : SCL1, SDA1
Port function selection bit
0 : P12, P14 functions as port
1 : SCL2, SDA2
Transfer direction selection bit
0 : LSB first
1 : MSB first
Fix these bits to “0”
0
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相关代理商/技术参数 |
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| M37270ERSS | 功能描述:EMULATION MCU/8BIT CMOS EMULATIO RoHS:否 类别:编程器，开发系统 >> 配件 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 标准包装:1 系列:- 附件类型:USB 至 1-Wire? RJ11 适配器 适用于相关产品:1-Wire? 设备 产品目录页面:1429 (CN2011-ZH PDF) |
| M37270MF | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37270MF-100SP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37270MF-101SP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37270MF-103SP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
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