參數(shù)資料
型號： 4571
廠商： Renesas Technology Corp.
英文描述： SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述： 單芯片4位微機的CMOS
文件頁數(shù)： 87/126頁
文件大?。?/td> 1627K
代理商： 4571
Rev.1.02
May 25, 2007
Page 63 of 124
REJ03B0179-0102
4571 Group
CONTROL REGISTERS
Note 1.”R” represents read enabled, and “W” represents write enabled.
Note 2.When the contents of I12 and I13 are changed, the external interrupt request flag EXF0 may be set.
Note 3.When the contents of I22 and I23 are changed, the external interrupt request flag EXF1 may be set.
Interrupt control register V1
at reset : 00002
at RAM back-up : 00002
R/W
TAV1/TV1A
V13
Timer 2 interrupt enable bit
0
Interrupt disabled (SNZT2 instruction is valid)
1
Interrupt enabled (SNZT2 instruction is invalid)
V12
Timer 1 interrupt enable bit
0
Interrupt disabled (SNZT1 instruction is valid)
1
Interrupt enabled (SNZT1 instruction is invalid)
V11
External 1 interrupt enable bit
0
Interrupt disabled (SNZ1 instruction is valid)
1
Interrupt enabled (SNZ1 instruction is invalid)
V10
External 0 interrupt enable bit
0
Interrupt disabled (SNZ0 instruction is valid)
1
Interrupt enabled (SNZ0 instruction is invalid)
Interrupt control register V2
at reset : 00002
at RAM back-up : 00002
R/W
TAV2/TV2A
V23
Voltage drop detector interrupt enable bit
0
Interrupt disabled (SNZVD instruction is valid)
1
Interrupt enabled (SNZVD instruction is invalid)
V22
Not used
0
This bit has no function, but read/write is enabled.
1
V21
Not used
0
This bit has no function, but read/write is enabled.
1
V20
Timer 3 interrupt enable bit
0
Interrupt disabled (SNZT3 instruction is valid)
1
Interrupt enabled (SNZT3 instruction is invalid)
Interrupt control register I1
at reset : 00002
at RAM back-up : state retained
R/W
TAI1/TI1A
I13
INT0 pin input control bit (Note 2)
0
INT0 pin input disabled
1
INT0 pin input enabled
I12
Interrupt valid waveform for INT0 pin/
return level selection bit (Note 2)
0
Falling waveform (“L” level of INT0 pin is recognized with the SNZI0
instruction)/“L” level
1
Rising waveform (“H” level of INT0 pin is recognized with the SNZI0
instruction)/“H” level
I11
INT0 pin edge detection circuit control bit
0
One-sided edge detected
1
Both edges detected
I10
INT0 pin
timer 1 control enable bit
0
Timer 1 disabled
1
Timer 1 enabled
Interrupt control register I2
at reset : 00002
at RAM back-up : state retained
R/W
TAI2/TI2A
I23
INT1 pin input control bit (Note 3)
0
INT0 pin input disabled
1
INT0 pin input enabled
I22
Interrupt valid waveform for INT1 pin/
return level selection bit (Note 3)
0
Falling waveform (“L” level of INT0 pin is recognized with the SNZI1
instruction)/“L” level
1
Rising waveform (“H” level of INT0 pin is recognized with the SNZI1
instruction)/“H” level
I21
INT1 pin edge detection circuit control bit
0
One-sided edge detected
1
Both edges detected
I20
Not used
0
This bit has no function, but read/write is enabled.
1
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