HS-80C85RH
A8-15
AD0-7
ALE
RD
HS-80C85RH
WR
IO/M
CLK
RESET OUT
READY
VDD
TIMER OUT
HS-81C56RH
(RAM + I/O + COUNTER/TIMER)
HS-83C55RH
(ROM +I/O)
(6)
(8)
(8)
(8)
(8)
† Optional Connection
FIGURE 13. HS-80C85RH MINIMUM SYSTEM (MEMORY MAPPED I/O)
VSS VDD
X1
X2
RESET IN
TRAP
HOLD
HLDA
SOD
SID
RST 7.5
RST 6.5
RST 5.5
INTR
HS-80C85RH
S1
RESET
OUT
RDY CLK
INTA
ADDR
S0
ADDR/
DATA ALE RD WR IO/M
(8)
(8)
IO/M (CS)
WR
RD
STANDARD
MEMORY
HS-82C12RH
DATA
ADDR (CS)
CLK
RESET
I/O PORTS,
CONTROLS
IO/M (CS)
(16)
WR
RD
DATA
STANDARD
I/O
ADDR
VDD
VDD
VDD
FIGURE 14. HS-80C85RH SYSTEM (USING STANDARD MEMORIES)
Spec Number 518054
15
INTERSIL [ Intersil ]
