參數(shù)資料
型號: M34501M4-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, MICROCONTROLLER, PDSO20
封裝: 5.30 X 12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20
文件頁數(shù): 33/116頁
文件大?。?/td> 859K
代理商: M34501M4-XXXFP
4501 Group
Rev.3.01
2005.02.07
page 23 of 112
REJ03B0104-0301
(2) External interrupt control registers
Interrupt control register I1
Register I1 controls the valid waveform for the external 0 inter-
rupt. Set the contents of this register through register A with the
TI1A instruction. The TAI1 instruction can be used to transfer the
contents of register I1 to register A.
Table 8 External interrupt control register
I13
I12
I11
I10
INT pin input control bit (Note 2)
Interrupt valid waveform for INT pin/
return level selection bit (Note 2)
INT pin edge detection circuit control bit
INT pin
timer 1 control enable bit
Interrupt control register I1
R/W
at RAM back-up : state retained
at reset : 00002
INT pin input disabled
INT pin input enabled
Falling waveform (“L” level of INT pin is recognized with the SNZI0
instruction)/“L” level
Rising waveform (“H” level of INT pin is recognized with the SNZI0
instruction)/“H” level
One-sided edge detected
Both edges detected
Disabled
Enabled
0
1
0
1
0
1
0
1
Notes 1: “R” represents read enabled, and “W” represents write enabled.
2: When the contents of I12 and I13 are changed, the external interrupt request flag EXF0 may be set. Accordingly, clear EXF0 flag with the SNZ0 in-
struction when the bit 0 (V10) of register V1 to “0”. In this time, set the NOP instruction after the SNZ0 instruction, for the case when a skip is
performed with the SNZ0 instruction.
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