參數(shù)資料
型號: HD404669
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): 82/142頁
文件大?。?/td> 894K
代理商: HD404669
HD404669 Series
82
If the state changes from transfer to another state, the serial 1 interrupt request flag (IFS1: $003, bit 2) is
set by the octal counter that is reset to 000.
Continuous clock output state (only in internal clock mode): Continuous clock output state is entered
only in internal clock mode. In this state, the serial interface does not transmit/receive data but only
outputs the transmit clock from the
SCK
1
pin.
When bits 1 and 0 (PMRA1, PMRA0) of port mode register A (PMRA: $004) are 00 in transmit clock
wait state and if the transmit clock is input (17), the serial interface enters continuous clock output state.
If serial mode register 1A (SM1A: $005) is written to in continuous clock output mode (18), STS wait
state is entered.
High/Low Control in Idle States:
In idle states, that is, STS wait state and transmit clock wait state, the
output level of the SO
1
pin can be controlled by setting bit 1 (SM1B1) of serial mode register 1B (SM1B:
$028) to 0 or 1. The high/low
control example is shown in figure 60. Note that the high/low
level
cannot
be controlled in transfer state.
相關PDF資料
PDF描述
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