em78p468l ELAN Microelectronics Corp, em78p468l Datasheet - Page 20

• Manufacturer Part Number: em78p468l
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

EM78P468N/EM78P468L
8-Bit Microcontroller
14 •
6.1.16 RF/ISR (Interrupt Status Register)
6.1.17 Address: 10h~3Fh; R10~R3F (General Purpose Register)
Bit 4: Not used
Bit 3 (IROUTE): Define the function of P5.7/IROUT pin.
Bit 2 (TCCE): Define the function of P5.6/TCC pin.
Bit 1 (EINT1): Define the function of P5.5/INT1 pin.
Bit 0 (EINT0) : Define the function of P5.4/INT0 pin.
These bits are set to “1” when interrupt occurs respectively.
Bit 7 (ICIF): Port 6, Port 8, input status changed interrupt flag. Set when Port 6, Port 8
Bit 6 (LPWTF): interrupt flag of the internal low-pulse width timer underflow.
Bit 5 (HPWTF): interrupt flag of the internal high-pulse width timer underflow.
Bit 4 (CNT2F): interrupt flag of the internal Counter 2 underflow.
Bit 3 (CNT1F): interrupt flag of the internal Counter 1 underflow.
Bit 2 (INT1F): external INT1 pin interrupt flag.
Bit 1 (INT0F): external INT0 pin interrupt flag.
Bit 0 (TCIF): TCC timer overflow interrupt flag. Set when TCC timer overflows.
R10~R31F and R20~R3F (Banks 0~3) are general purpose registers.
Bit 7
ICIF
(Address: 0Fh)
EINT1 = “1” : for external interrupt pin of INT1, the control bit of P5.5 (Bit 5 of
IROUTE = “0” : for bi-directional general I/O pin.
IROUTE = “1” : for IR or PWM output pin, the control bit of P5.7 (Bit 7 of IOC50)
TCCE = “0” : for bi-directional general I/O pin.
TCCE = “1” : for external input pin of TCC, the control bit of P5.6 (Bit 6 of IOC50)
EINT1 = “0” : for bi-directional general I/O pin.
EINT0 = “0” : for bi-directional general I/O pin.
EINT0 = “1” : for external interrupt pin of INT0, the control bit of P5.4 (Bit 4 of
LPWTF
input changes.
Bit 6
must be set to “1”
IOC50) must be set to “1”
IOC50) must be set to “1”
must be set to “0”
HPWTF
Bit 5
CNT2F
Bit 4
(This specification is subject to change without further notice)
CNT1F
Bit 3
Product Specification (V1.5) 02.15.2007
INT1F
Bit 2
INT0F
Bit 1
TCIF
Bit 0