EM78808
8-bit Micro-controller
1
:
0
:
0
:
0
:
0
:
0
:
Stack 32
:
User can read bit 5 .. bit 0 to understand how many stack layer that program used . Bit 5 .. bit 0 is a six bit
counter. The counter will incrementally after user use internal , external interrupt or “CALL” instruction and it
will decrement when user use “RET” or “RETI” instruction. When Bit6(STKM) is set to 1 and bit 5 .. bit 0 are
0b011110 ꢂ0b011111 , interrupt will occur.
Bit 6(STKM) : Stack overflow mask bit.
0 ꢂSTK interrupt disable.
1 ꢂSTK interrupt enable.
Bit 7(STKF) : Stack Point overflow interrupt flag bit.
STKF will set to 1 when bit 5 .. bit 0 are 0b011110 ꢂ0b011111
IX AC Electrical Characteristic
Tdiea
Tdiei
Delay from Phase 3 end toCl=100pF
INSEND active
Delay from Phase 4 end toCl=100pF
INSEND inactive
30
30
ns
ns
Tiew
Tdca
INSEND pulse width
Delay from Phase 4 end to CAC1=100pF
Bus valid
ROM data access time
ROM data setup time
30
ns
ns
30
30
Tacc
Tcds
Tcdh
Tdca-1
100
20
20
ns
ns
ns
ns
ROM data hold time
Delay time of CA-1
C1=10
0pF
Note 1: N= selected prescaler ratio.
______________________________________________________________________________________________________________________________________________________
* This specification is subject to change without notice.
8/1/2004 (V3.1)
62
ELAN [ ELAN MICROELECTRONICS CORP ]
