Z80181 Zilog., Z80181 Datasheet - Page 27

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

Zilog
DS971800500
Upon Reset
Upon Reset
R/W
R/W
Bit
Bit
DSTAT
DMODE
DE1
R/W
DM1, 0
MMOD
0
1
-
00
01
10
11
0
1
DE0
R/W
0
1
Destination
-
Cycle Steal Mode
Burst Mode
/DWE1
I/O
M
M
M
DM1
Mode
W
R/W
1
0
/DWE0
Figure 35. DMA Status Register
Figure 36. DMA Mode Registers
DM0
W
R/W
DAR0 Fixed
DAR0 Fixed
1
0
Address
DAR0+1
DAR0-1
DIE1
R/W
SM1
R/W
0
0
DIE0
R/W
SM0 MMOD
R/W
0
0
SM1, 0
00
01
10
11
R/W
1
-
0
Addr 30h
Addr 31h
DIME
Source
R
0
I/O
M
M
M
1
-
DMA Master Enable
DMA Interrupt Enable 1, 0
DMA Enable Bit Write Enable 1, 0
DMA Enable Ch 1, 0
SAR0 Fixed
SAR0 Fixed
Memory MODE Select
Ch 0 Source Mode 1, 0
Ch 0 Destination Mode 1, 0
Address
SAR0+1
SAR0-1
S
MART
A
CCESS
C
ONTROLLER
Z80181
2-27
SAC
™