參數(shù)資料
型號： MB90M407PF
元件分類： 微控制器/微處理器
英文描述： MICROCONTROLLER, PQFP100
封裝： 14 X 20 MM, 3.35 MM HEIGHT, 0.65 MM PITCH, PLASTIC, QFP-100
文件頁數(shù)： 18/68頁
文件大?。?/td> 1486K
代理商： MB90M407PF
MB90M405 Series
DS07-13718-3E
25
2.
Serial I/O
Serial I/O allows data transfer via synchronization with a clock consisting of two 8-bit channels. In addition, LSB
first or MSB first can be selected for data transfer.
Overview of Serial I/O
There are two types of serial I/O operation mode :
Internal shift clock mode
Data is transferred in synchronization with internal clock (communication prescaler)
External shift clock mode
Data is transferred in synchronization with clock input from external pin (SC) . In this mode, it is also possible
to transfer data via CPU instructions (port inversion instruction execution timing) by manipulating the general-
purpose port sharing the external pin (SC) .
Block Diagram of Serial I/O
SMD1
SMD2
SI2
SO2, SO3
SC2, SC3
SMD0
SIE
SIR
BUSY STOP STRT MODE BDS
SOE SCOE
21
0
Internal data bus
(MSB first) D0 to D7
D0 to D7 (LSB first)
Transference direction selection
SDR (serial data register)
Read
Write
Control circuit
Shift clock
counter
Internal clock
(Communication prescaler control register (CDCR) )
Interrupt
request
Internal data bus
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