參數(shù)資料
型號(hào): HD40A4669
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(jì)算機(jī))
中文描述: 低電壓如同在微機(jī)芯片的DTMF產(chǎn)生電路(帶雙音多頻電路的低電壓微計(jì)算機(jī))
文件頁數(shù): 87/142頁
文件大?。?/td> 894K
代理商: HD40A4669
HD404669 Series
87
Bit
Initial value
Read/Write
Bit name
3
0
W
SM1A3
2
0
W
SM1A2
0
0
W
SM1A0
1
0
W
SM1A1
Serial mode register 1A (SM1A: $005)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
SM1A2
SM
SM1A1
SM1A3
0
1
R4
1
mode selection
1
1
/
SCK
R4
1
1
SCK
SCK
Output
Output
Input
Clock source
Prescaler
Prescaler
System clock
External clock
Figure 62 Serial Mode Register 1A (SM1A)
Serial Mode Register 1B (SM1B: $028):
This register has the following functions (figure 63).
Serial clock division ratio selection
High/low level control in idle states
Serial mode register 1B (SM1B: $028) is a 2-bit write-only register. It cannot be written during data
transfer.
Setting bit 0 (SM1B0) of the serial mode register 1B (SM1B: $028) selects the divisor applied to the
prescaler output used for the transfer clock. Only bit 0 (SM1B0) is cleared to 0 by an MCU reset or when
the MCU switches to stop mode.
Bit 1 (SM1B1) of the serial mode register (SM1B: $028) controls the high/low state of the SO
1
pin during
idle. The SO
1
pin changes state as soon as the high/low control bit is written. The value of this bit is
undefined after a reset or when the MCU enters stop mode.
相關(guān)PDF資料
PDF描述
HD404668 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
HD404669 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
HD407A4669 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計(jì)算機(jī))
HD404719FS Five timer/counters
HD404439FS Five timer/counters
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