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| 型号： | MSM6636JS |
| 厂商： | OKI ELECTRIC INDUSTRY CO LTD |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 1 CHANNEL(S), 41.6K bps, LOCAL AREA NETWORK CONTROLLER, PQCC18 |
| 封装： | 0.290 INCH, 1.27 MM PITCH, PLASTIC, QFJ-18 |
| 文件页数： | 26/72页 |
| 文件大小： | 707K |
| 代理商： | MSM6636JS |
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MSM6636/6636B User’s Manual
CPU Interfaces
4 – 5
4.1.2 UART Interface (Start-Stop Synchronization System)
Normal Mode
[PIN CONNECTION]
M-N
CPU
MSM6636
Pxx
A-D
SOUT
RXD
SIN
TXD
INT
SCLK/PAE
U-C
Parity Select
V
DD
V
DD
A-D pin input selects whether serial bus data is address or data information. (For control purposes, connect the
A-D pin to the general purpose port (Pxx) output, etc. of the CPU.) In UART, transmit/receive is controlled by
a shift clock with a 1/64 source oscillation frequency. If UART is used, set the baud rate at the CPU side.
[Example] If the source oscillation is 4 MHz, the transmission speed is 4 MHz/64 = 62.5 kbps.
SCLK/PAE pin = “H” selects parity yes, “L” selects parity no. This is determined by the pin status immediately
after RESET. When changing a setting, be certain to reset, since setting cannot be changed during
communication. (Parity is even parity.)
[WRITE PROCEDURE]
Send the address of the write target register and the communication type first, then send the write data. Since
address values are automatically incremented, it may be quicker to write data to registers that have consecutive
addresses.
An example of a parity yes condition follows.
1.
Set “1” to the A-D pin to send the write destination address and the communication type.
2.
Send start bit “0” and 8 bits of register write code M1, M0 = “0, 1”, and write destination address values
“A5 to A0” to RXD input with LSB first. When sending, add even parity (when parity yes is selected) and
stop bit “1” after the MSB bit.
3.
After detecting the edge of start bit “0”, the MSM6636 generates a shift clock synchronizing data and
samples data in the sequence of input to RXD.
4.
Set “0” to the A-D pin to send write data.
5.
Send the start bit, 8 bits of write data (LSB first), the parity bit and the stop bit to RXD input in this order.
6.
Auto increment of write destination address values occurs after each data write. (This makes continuous
data writing quicker by eliminating some address selections.)
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相关代理商/技术参数 |
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|---|---|
| MSM6641 | 制造商:OKI 制造商全称:OKI electronic componets 功能描述:Built-in Remote Control Transmission Circuit 4-Bit Microcontroller |
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| MSM6648 | 制造商:OKI 制造商全称:OKI electronic componets 功能描述:100-DOT COMMON DRIVER |
| MSM6650 | 制造商:OKI 制造商全称:OKI electronic componets 功能描述:SI/SD Voice Recognizer, Recorder/Player, and Speech Synthesizer |
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