參數(shù)資料
型號: MB89951PFM
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 5 MHz, MICROCONTROLLER, PQFP64
封裝: 0.65 MM PITCH, QFP-64
文件頁數(shù): 70/110頁
文件大?。?/td> 619K
代理商: MB89951PFM
HARDWARE CONFIGURATION
2– 47
Fig. 2.16 ORFE Flag Set Timing
b. Transmission
When the next data is ready to write after data written to the SODR (serial
output data register) is transferred to the interrupt shift register, the TDRE
(transmit data register empty) flag is set and an interrupt request is output
to the CPU.
Fig. 2.17 TDRE Flag Set Timing
(c) Transfer data format
The UART can handle only NRZ (non-return-to-zero)-type data. The
relationship between transmitter/receiver clocks and data is shown in the
figure below.
Fig. 2.18 Transfer Data Format (Synchronous Transfer)
Peripherals
Data
SIN interrupt
RDRF = 1
Stop
(Overrun error)
ORFE
Data
SIN interrupt
RDRF = 0
Stop
(Framing error)
ORFE
SODR write
TDRE
S
01234567
P
S
0123
SOUT interrupt
SOUT output
Interrupt request output to CPU
S: Start bit 0 to 7: Data bitsP: Stop bit
SCK
SI, SO
01011001
011
Start LSB
MSB Stop
Stop Stop
Varies with mode
Transmitted data is 01001101B (mode 1) or 101001101B (mode 3)
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