Master address read register (MARH, MARL)
Address: 00007D
H
Read/write
Initial value
Address: 00007C
H
Read/write
Initial value
Multiaddress, control bit read register (DCRR)
Address: 00007F
H
Read/write
Initial value
Telegraph length read register (DERR)
Address: 00007E
H
Read/write
Initial value
Read data buffer (RDB)
Address: 000081
H
Read/write
Initial value
Write data buffer (WDB)
Address: 000080
H
Read/write
Initial value
MB90580 Series
15
14
13
Reserved Reserved
Reserved
(R)
(R)
(R)
(1)
(1)
(1)
7
6
MA07
MA06
MA05
(R)
(R)
(R)
(X)
(X)
(X)
15
14
DO3
DO2
DO1
(R)
(R)
(R)
(0)
(0)
(0)
7
6
5
DE7
DE6
DE5
(R)
(R)
(R)
(X)
(X)
(X)
15
14
RD7
RD6
RD5
(R)
(R)
(R)
(X)
(X)
(X)
7
6
5
WD7
WD6
WD5
(W)
(W)
(W)
(X)
(X)
Figure 13.3c Registers of IE BUS (3/3)
12
11
MA11
Reserved
(R)
(R)
(1)
(X)
5
4
3
MA04
MA03
(R)
(R)
(X)
(X)
13
12
11
DO0
C3
(R)
(R)
(X)
(X)
4
3
DE4
DE3
(R)
(R)
(X)
(X)
13
12
11
RD4
RD3
(R)
(R)
(X)
(X)
4
3
WD4
WD3
(W)
(W)
(X)
(X)
(X)
13.3 Registers and Register Details
10
9
8
MA10
MA09
MA08
(R)
(R)
(R)
(X)
(X)
(X)
2
1
0
MA02
MA01
MA00
(R)
(R)
(R)
(X)
(X)
(X)
10
9
8
C2
C1
C0
(R)
(R)
(R)
(X)
(X)
(X)
2
1
0
DE2
DE1
DE0
(R)
(R)
(R)
(X)
(X)
(X)
10
9
8
RD2
RD1
RD0
(R)
(R)
(R)
(X)
(X)
(X)
2
1
0
WD2
WD1
WD0
(W)
(W)
(W)
(X)
(X)
(X)
Chapter 13: IE Bus
Bit Number
MARH
Bit Number
MARL
Bit Number
DCRR
Bit Number
DERR
Bit Number
RDB
Bit Number
WDB
145