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参数资料
| 型号： | M37702M2BXXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | QFP-80 |
| 文件页数： | 28/61页 |
| 文件大小： | 760K |
| 代理商： | M37702M2BXXXFP |
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MITSUBISHI MICROCOMPUTERS
M37702M2AXXXFP, M37702M2BXXXFP
M37702S1AFP, M37702S1BFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
ASYNCHRONOUS SERIAL
COMMUNICATION
Asynchronous serial communication can be performed using 7-,
8-, or 9-bit length data. The operation is the same for all data
lengths. The following is the description for 8-bit asynchronous
communication.
With 8-bit asynchronous communication, the bit 0 of UARTi trans-
mit/receive mode register is “1“, the bit 1 is “0”, and the bit 2 is “1”.
Bit 3 is used to select an internal clock or an external clock. If bit 3
is “0”, an internal clock is selected and if bit 3 is “1”, then external
clock is selected. If an internal clock is selected, the bit 0 (CS0)
and bit 1 (CS1) of UARTi transmit/receive control register 0 are
used to select the clock source. When an internal clock is selected
for asynchronous serial communication, the CLKi pin can be used
as a normal I/O pin.
The selected internal or external clock is divided by (n +1), then by
16, and passed through a control circuit to create the UART trans-
mission clock or UART receive clock.
Therefore, the transmission speed can be changed by changing
the contents n of the bit rate generator. If the selected clock is an
internal clock fi or an external clock fEXT,
Bit Rate = (fi or fEXT)
/ {(n + 1) ! 16}
Bit 4 is the stop bit length selection bit to select 1 stop bit or 2 stop
bits.
The bit 5 is a selection bit of odd parity or even parity.
In the odd parity mode, the parity bit is adjusted so that the sum of
the 1’s in the data and parity bit is always odd.
In the even parity mode, the parity bit is adjusted so that the sum
of the 1’s in the data and parity bit is always even.
Fig. 40 Transmit timing example when 8-bit asynchronous communication with parity and 1 stop bit is selected
Fig. 41 Transmit timing example when 9-bit asynchronous communication with no parity and 2 stop bits is selected
D6 D7
ST
D1 D2 D3
D4 D5
P SP ST
ST D0 D1
TEi
(1 / f1 , or 1 / fEXT) ! (n + 1) ! 16
Transmission clock
CTSi
Write in transmission buffer register
TIi
TENDi
TXDi
TXEPTYi
Transmission register
← Transmission
buffer register
Stopped because TEi = “0”
Start bit
Parity bit Stop bit
D0
D6
D7
D1
D2 D3 D4
D5
P
SP
D0
TEi
Transmission clock
TIi
TENDi
TXDi
TXEPTYi
(1 / f1 or 1 / fEXT) ! (n + 1) ! 16
Write in transmission buffer register
Transmission register
←
Transmission
buffer register
Stopped because
Start bit
Stop Bit Stop Bit
TEi = “0”
D6
ST
D1
D2 D3 D4 D5
D8 SP
ST D0 D1
D0
D6 D7
D1 D2 D3 D4 D5
SP
D0
D7
SP
D8
ST
D2
相关PDF资料 |
PDF描述 |
|---|---|
| M37702S1AFP | 16-BIT, 16 MHz, MICROCONTROLLER, PQFP80 |
| M37702M2AXXXFP | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP80 |
| M37702S1BFP | 16-BIT, 25 MHz, MICROCONTROLLER, PQFP80 |
| M37702S1LGP | 16-BIT, 8 MHz, MICROCONTROLLER, PQFP80 |
| M37702S1LHP | 16-BIT, 8 MHz, MICROCONTROLLER, PQFP80 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M37702M2B-XXXFP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37702M2L | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37702M2L249HP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37702M2L-249HP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37702M2L-265HP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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