EM78P809N
8-Bit Microcontroller
Bit 3 ( TBIE ) : Time base timer interrupt enable bit.
TBIE = “0” : disable TBIF interrupt
TBIE = “1” : enable TBIF interrupt
Bit 2 ( EXIE1 ) : External INT 1 Interrupt enable bit.
EXIE1 = “0” : disable EXIF1 interrupt
EXIE1 = “1” : enable EXIF1 interrupt
Bit 0 ( TCIE0 ) : TCC Interrupt enable bit.
TCIE0 = “0” : disable TCIF0 interrupt
TCIE0 = “1” : enable TCIF0 interrupt
ꢂ
ꢂ
ꢂ
Individual interrupt is enabled by setting its associated control bit in the IMR2
to "1".
Global interrupt is enabled by the ENI instruction and is disabled by the DISI
instruction.
IMR2 register is both readable and writable.
4.4 CPU Operation Mode
Registers for CPU operation mode
R_BANK Address
NAME
SCR
Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
BANK 0
0X05
0
PS2
R/W
PS1
R/W
PS0
R/W
0
1
SIS
REM
--
--
--
R/W
R/W
* R_BANK: Register Bank (bits 7, 6 of R3), R/W: Read/Write
Reset Occurs
SIS=0 + SLEP
SIS=1 + SLEP
IDLE MODE
CPU : Halts
Fosc: Oscillates
NORMAL MODE
CPU : Operating
Fosc: Oscillates
SLEEP MODE
CPU : Halts
Fosc: Stops
Interrupt
/SLEEP Pin Input
Fig 5. Operation Mode and Switching
Product Specification (V1.0) 07.26.2005
• 27
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
