82C59A
Timing Waveforms (Continued)
(3)
TRLRH
RD/INTA
(18)
TRLEL
(19)
TRHEH
EN
(2)
TRHAX
(1)
TAHRL
CS
ADDRESS BUS
A
0
(14)
TRLDV
(15)
TRHDZ
DATA BUS
(20)
TAHDV
FIGURE 13. READ/INTA
RD
INTA
(11)
TRHRL
WR
(12)
TWHWL
RD
INTA
WR
(13)
TCHCL
RD
INTA
WR
FIGURE 14. OTHER TIMING
(16)
TJHIH
IR
SEE NOTE 3
SEE NOTE 4
(9)
TJLJH
INT
INTA
SEE NOTE 1
SEE
NOTE 2
DB
(10)
(10)
TCVIAL
TCVIAL
CAS 0 - 2
(17)
(21)
TIALCV
TCVDV
NOTES:
1. Interrupt Request (IR) must remain HIGH until leading edge of first INTA.
2. During first INTA the Data Bus is not active in 80C86/88/286 mode.
3. 80C86/88/286 mode.
4. 8080/8085 mode.
FIGURE 15. INTA SEQUENCE
4-18
INTERSIL [ Intersil ]
