em78p809n ELAN Microelectronics Corp, em78p809n Datasheet - Page 16

• Manufacturer Part Number: em78p809n
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

EM78P809N
8-Bit Microcontroller
12 •
TC4D7
EXIF5
Bit 7
Bit 7
Bit 7
TC4D − Timer 4 Data Buffer ( Address: 0Ch )
ISFR0 − Interrupt Status Flag Register 0 and INT3 Edge Detect Flag.
( Address : 0Dh )
ISFR1 − Interrupt Status Flag Register 1 ( Address: 0Eh )
Bit 7 ~ Bit 0 ( TC4D7 ~ TC4D0 ) : Data buffer of 8-bit Timer/Counter 4.
Bit 5 ( INT3F ) : External interrupt 3 falling edge detect flag.
Bit 4 ( INT3R ) : External interrupt 3 rising edge detect flag.
Bit 1 ( WDTIF ) : WDT time-out flag, flag cleared by software.
Bit 0 ( EXIF0 ) : External interrupt flag (INT0). Flag cleared by software. If the
Bit 7 ( EXIF5 ) : External Interrupt Flag (/INT5), flag cleared by software.
Bit 6 ( TCIF2 ) : 16-bit Timer/Counter 2 Interrupt Flag, flag cleared by software.
Bit 5 ( ADIF ) : AD conversion complete flag, flag cleared by software.
Bit 3 ( EXIF3 ) : External Interrupt Flag (/INT3), flag cleared by software.
Bit 2 ( TCIF4 ) : 8-bit Timer/Counter 4 Interrupt Flag, flag cleared by software.
Bit 1 ( SPIF ) : SPI Mode Interrupt Flag, flag cleared by software.
Bit 0 ( TCIF3 ) : 8-bit Timer/Counter 3 interrupt flag, flag cleared by software.
0
IMR1.
ISFR1 can be cleared by instruction, but cannot be set by instruction
IMR1 is the interrupt mask register
Note that reading ISFR1 will obtain the result of the ISFR1 "logic AND" and
INT3F = “0” : Falling edge is not detected
INT3F = “1” : Falling edge is detected
INT3R = “0” : Rising edge is not detected
INT3R = “1” : Rising edge is detected
TC4D6
TCIF2
Bit 6
Bit 6
Bit 6
0
"1" means interrupt request, "0" means non-interrupt
INT0EN is reset to “0”, the flag is cleared.
TC4D5
INT3F
ADIF
Bit 5
Bit 5
Bit 5
TC4D4
INT3R
Bit 4
Bit 4
Bit 4
(This specification is subject to change without further notice)
0
TC4D3
EXIF3
Bit 3
Bit 3
Bit 3
0
Product Specification (V1.0) 07.26.2005
TC4D2
TCIF4
Bit 2
Bit 2
Bit 2
0
TC4D1
WDTIF
SPIF
Bit 1
Bit 1
Bit 1
TC4D0
EXIF0
TCIF3
Bit 0
Bit 0
Bit 0