參數(shù)資料
型號: GMS87C2020K
廠商: HYNIX SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: HYUNDAI MICRO ELECTRONICS 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP64
封裝: SDIP-64
文件頁數(shù): 69/107頁
文件大小: 1482K
代理商: GMS87C2020K
HMS81C2012A/2020A
SEP. 2004 Ver 2.00
65
14.2 The method of Serial I/O
Select transmission/receiving mode
Note:
When external clock is used, the frequency should
be less than 1MHz and recommended duty is 50%.
In case of sending mode, write data to be send to SIOR.
Set SIOST to “1” to start serial transmission.
Note:
If both transmission mode is selected and transmis-
sion is performed simultaneously it would be made error.
The SIO interrupt is generated at the completion of SIO
and SIOSF is set to “1”. In SIO interrupt service routine,
correct transmission should be tested.
In case of receiving mode, the received data is acquired
by reading the SIOR.
14.3 The Method to Test Correct Transmission
Figure 14-5 Serial Method to Test Transmission
Serial I/O Interrupt
Service Routine
SE = 0
Write SIOM
Normal Operation
Overrun Error
Abnormal
SIOSF
0
1
- SE : Interrupt Enable Register Low IENL(Bit3)
- SR : Interrupt Request Flag Register Low IRQL(Bit3)
SR
0
1
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