EM78860
8-BIT MICRO-CONTROLLER
• Bit 6 :unused. Please set to ‘0’.
• Bit 7 (INT3) external INT3 pin interrupt flag.
• High to low edge trigger , Refer to the Interrupt subsection.
• IOCF is the interrupt mask register. User can read and clear.
R10~R3F (General Purpose Register)
• R10~R3F (Banks 0~3) all are general purpose registers.
Special Purpose Registers
A (Accumulator)
• Internal data transfer, or instruction operand holding
• It’s not an addressable register.
CONT (Control Register)
7
-
6
INT
5
TS
4
-
3
PAB
2
1
0
PSR2
PSR1
PSR0
• Bit 0 (PSR0) ~ Bit 2 (PSR2) TCC/WDT prescaler bits.
PSR2
PSR1
PSR0
TCC Rate
1:2
WDT Rate
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
1:1
1:2
1:4
1:4
1:8
1:16
1:32
1:64
1:128
1:256
1:8
1:16
1:32
1:64
1:128
• Bit 3 ( PAB ) Prescaler assignment bit
0/1: TCC/WDT
• Bit 4 unused
• Bit 5 ( TS ) : TCC signal source
0 : internal instruction cycle clock
1 : 16.38KHz
• Bit 6 : (INT)INT enable flag
0: interrupt masked by DISI or hardware interrupt
1: interrupt enabled by ENI/RETI instructions
• Bit 7 : unused
• CONT register is readable and writable.
* This specification are subject to be changed without notice.
6.24.1998
9
ELAN [ ELAN MICROELECTRONICS CORP ]
