參數(shù)資料
型號: ST63E69D1
廠商: 意法半導(dǎo)體
英文描述: 8-BIT HCMOS MCU FOR DIGITAL CONTROLLED MULTI FREQUENCYMONITOR
中文描述: 8位HCMOS單片機(jī)的數(shù)控多FREQUENCYMONITOR
文件頁數(shù): 42/71頁
文件大?。?/td> 584K
代理商: ST63E69D1
SERIAL PERIPHERAL INTERFACE
(Continued)
Figure47.Sofware Bus (Hardware Bus Disabled)Timing Diagram
STD SPIProtocol (Shift Register)
This protocol is similar to the I
2
CBUS with the ex-
ception that there is no acknowledge pulse and
there areno stopor start bits.The clockcannot be
slowed downbythe externalperipherals.
In this case all three outputs should be high in or-
der notto lock thesoftware I/Osfrom functioning.
SPI Standard Bus Protocol:
The standard bus
protocol is selected by loading the SPI Control
Register 1 (SCR1 Add. EBH). Bit 0 named I
2
C
mustbe set atone andbit1namedSTD mut bere-
set. When the standard bus protocol is selectedbit
2 of the SCR1 is meaningless.
This bitnamed STOP bitis used onlyin I
2
CBUS or
SBUS. However take care thet THE STOP BIT
MUSTBE RESETWHEN THE STANDARD PRO-
TOCOL ISUSED.This bit is setto ZERO afterRE-
SET.
ST6369
38/67
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