參數(shù)資料
型號(hào): DS89C450
英文描述: Ultra-High-Speed Flash Microcontrollers
中文描述: 超高速閃存微控制器
文件頁數(shù): 10/48頁
文件大?。?/td> 934K
代理商: DS89C450
DS89C430/DS89C440/DS89C450 Ultra-High-Speed Flash Microcontrollers
10 of 48
Figure 4. Serial Port Timing
t
XLXL
t
XHDV
t
XHDX
t
XHQX
t
QVXH
TRANSMIT
RECEIVE
ALE
WRITE TO SBUF
PSEN
RXD DATA OUT
TXD CLOCK
TXD CLOCK
R1
TI
WRITE TO SCON
TO CLEAR RI
RXD DATA IN
D0
DI
D3
D4
D2
D5
D6
D7
D7
D6
D5
D4
D3
D2
DI
D0
RXD DATA IN
TXD CLOCK
TO CLEAR RI
R
T
D0
DI
D6
D7
R1
D0
DI
D6
D7
1/(XTAL FREQ/12)
ALE
PSEN
WRITE TO SBUF
RXD DATA OUT
TXD CLOCK
TI
TXD CLOCK
SERIAL PORT (SYNCHRONOUS MODE)
SM2 = 0 TDX CLOCK = XTAL FREQ/12
SERIAL PORT (SYNCHRONOUS MODE)
SM2 = 1 TDX CLOCK = XTAL FREQ/4
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