參數(shù)資料
型號(hào)： S1C6S460D
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 2 MHz, MICROCONTROLLER, UUC124
封裝： 4.69 X 4.68 MM, DIE-124
文件頁(yè)數(shù)： 81/107頁(yè)
文件大小： 788K
代理商： S1C6S460D
S1C6S460 TECHNICAL MANUAL
EPSON
67
CHAPTER 9: SERIAL INTERFACE
ISIO (F03H [D0], R)
This is the interrupt factor flag of the serial interface.
When "1" is read: Interrupt has occurred
When "0" is read: Interrupt has not occurred
Writing: Invalid
From the status of this flag, the software can decide whether the serial interface interrupt. Note, however,
that even if the interrupt is masked, this flag will be set to "1" after the 8 bits data input/output.
Be sure that the interrupt factor flag reading is done with the interrupt in the DISABLE state (DI). Read-
ing the interrupt factor flag while in the ENABLE state (EI) may cause malfunction.
At initial reset, this flag is set to "0".
9.6 Programming Notes
(1) When using the serial interface in the master mode, the synchronous clock uses the CPU system clock.
Accordingly, do not change the system clock (fOSC1
fOSC3) while the serial interface is operating.
(2) Perform data writing/reading to data registers SD0–SD7 only while the serial interface is halted (i.e.,
the synchronous clock is neither being input or output).
(3) As a trigger condition, it is required that data writing or reading on data registers SD0–SD7 be per-
formed prior to writing "1" to SCTRG. (The internal circuit of the serial interface is initiated through
data writing/reading on data registers SD0–SD7.) Supply trigger only once every time the serial
interface is placed in the RUN state. Moreover, when the synchronous clock SCLK is external clock,
start to input the external clock after the trigger.
(4) Be sure that writing to the interrupt mask register is done with the interrupt in the DISABLE state
(DI). Writing to the interrupt mask register while in the ENABLE state (EI) may cause malfunction.
(5) Be sure that the interrupt factor flag reading is done with the interrupt in the DISABLE state (DI).
Reading the interrupt factor flag while in the ENABLE state (EI) may cause malfunction.
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