參數(shù)資料
型號: HD407A4669
廠商: Hitachi,Ltd.
英文描述: Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
中文描述: 低電壓如同在微機芯片的DTMF產(chǎn)生電路(帶雙音多頻電路的低電壓微計算機)
文件頁數(shù): 88/142頁
文件大?。?/td> 894K
代理商: HD407A4669
HD404669 Series
88
Bit
Initial value
Read/Write
Bit name
3
Not used
2
Not used
0
0
W
SM1B0
1
Undefined
W
SM1B1
SM1B0
0
1
Transmit clock division ratio
Prescaler output divided by 2
Prescaler output divided by 4
Serial mode register 1B (SM1B: $028)
SM1B1
0
1
Output level control in idle states
Low level
High level
Figure 63 Serial Mode Register 1B (SM1B)
Serial Data Register 1 (SR1L: $006, SR1U: $007):
This register has the following functions (figures 64
and 65).
Transmission data write and shift
Receive data shift and read
Writing data in this register is output from the SO
1
pin, LSB first, synchronously with the falling edge of
the transmit clock; data is input, LSB first, through the SI
1
pin at the rising edge of the transmit clock.
Input/output timing is shown in figure 66.
Data cannot be read or written during serial data transfer. If a read/write occurs during transfer, the
accuracy of the resultant data cannot be guaranteed.
Bit
Initial value
Read/Write
Bit name
3
Undefined
R/W
SR1L3
2
Undefined
R/W
SR1L2
0
Undefined
R/W
SR1L0
1
Undefined
R/W
SR1L1
Serial data register 1 (lower digit) (SR1L: $006)
Figure 64 Serial Data Register 1 (SR1L)
Bit
Initial value
Read/Write
Bit name
3
Undefined
R/W
SR1U3
2
Undefined
R/W
SR1U2
0
Undefined
R/W
SR1U0
1
Undefined
R/W
SR1U1
Serial data register 1 (upper digit) (SR1U: $007)
Figure 65 Serial Data Register 1 (SR1U)
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參數(shù)描述
HD407A4669H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit
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