Z80181 Zilog., Z80181 Datasheet - Page 51

• Manufacturer Part Number: Z80181
• Description: SMART ACCESS CONTROLLER (SAC)
• Manufacturer: Zilog.

Zilog
DS971800500
Data OUT
/ROMCS
/RAMCS
Address
Data IN
/WAIT
/IORQ
/WR
/RD
ST
Ø
"H"
[1] Output buffer is off at this point.
[2] Memory Read/Write cycle timing is the same as this figure, except there is
no automatic wait status (Twa), and /MREQ is active instead of /IORQ.
6
T1
Figure 60b. I/O Read/Write, Memory Read/Write Timing
27
9
22
70
7
T2
23
19
Twa
25, 25a
20
15
T3
28
12
24
16
26
S
11
11
T1
MART
21
A
CCESS
70
C
[1]
ONTROLLER
Z80181
2-51
SAC
™