参数资料
型号: M34508G4HFP
元件分类: 微控制器/微处理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO20
封装: 5.30 X12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20
文件页数: 17/32页
文件大小: 1049K
代理商: M34508G4HFP
Rev.1.03
2009.07.27
page 24 of 140
REJ03B0148-0103
4508 Group
(2) External interrupt control registers
Interrupt control register I1
Register I1 controls the valid waveform for the external 0 interrupt.
Set the contents of this register through register A with the TI1A in-
struction. The TAI1 instruction can be used to transfer the contents
of register I1 to register A.
Table 8 External interrupt control register
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.
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
TAI1/TI1A
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
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