Z8018x
Family MPU User Manual
6
UM005004-0918
Figure 4.
Z80180/Z8S180/Z8L180 Block Diagram
MMU
Address
Buffer
Data
Buffer
A0
–
A19
D0
–
DF
Asynchronous
SCI
(Channel 0)
CPU
DMACs
(2)
DREQ1
TEND1
CKA0/DREQ0
Interrupt
Bus State Control
Asynchronous
SCI
(channel 1)
RESET
RD
WR
MI
MREQ
IORQ
HALT
WA
IT
B
U
SR
EQ
BUS
A
CK
RFSH
ST
E
NMI
INT0
INT1
INT2
RXA0
RTS0
CTS0
DCD0
TXA0
TXA1
CKA1/TEND0
RXA1
V
CC
V
SS
16-bit
Programmable
Reload
Timers
TXS
RXS/CTS1
CKS
A18/TOUT
Clocked
Serial I/O
Port
Timing
Generator
A
ddress Bus
(16-b
it)
XTAL
EXTAL
Phi
D
a
ta
B
u
s (8
-b
it)
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