參數(shù)資料
型號: GMS87C7216LQ
廠商: Electronic Theatre Controls, Inc.
元件分類: 數(shù)學(xué)處理器
英文描述: 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述: 8位單晶片微控制器
文件頁數(shù): 60/121頁
文件大?。?/td> 1645K
代理商: GMS87C7216LQ
GMS81C7208/7216
56
FEB. 2005 Ver 1.04
15.2 The Method of Serial I/O
1. Select transmission/receiving mode
When external clock is used, the frequency should be less than
1MHz and recommended duty is 50%.
2. In case of sending mode, write data to be send to SIOR.
3. Set SIOST to “1” to start serial transmission.
If both transmission mode is selected and transmission is per-
formed simultaneously it would be made error.
4. The SIO interrupt is generated at the completion of SIO and
SIOSF is set to “1”. In SIO interrupt service routine, correct trans-
mission should be tested.
5. In case of receiving mode, the received data is acquired by
reading the SIOR.
Figure 15-4 SPI Timing Diagram at POL=1
15.3 The Method to Test Correct Transmission
Figure 15-5 Serial Method to Test Transmission
D1
D2
D3
D4
D6
D7
D0
D5
D1
D2
D3
D4
D6
D7
D0
D5
SIOST
SCLK [R05]
(POL=1)
SOUT [R06]
SIN [R07]
SCIIF
SIOSF
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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