Sharp MZ-5500 - Page 88

Pin No.
Signal name'
Inlaut Function
BDIR
BC2
BCl PSG function
0
0 1
LATCH ADDRESS
Indicates that the bus
retains the register
address to be latched in
the PSG.
0
1
0
INACTIVE
0
1
1
READ FROM PSG
Data in the register at
current address are sent
on the PSG/CPU bus.
1
0
0
LATCH ADDRESS
1
0
1
INACTIVE
1 1 0
WRITE Ta PSG
Indicates that the bus
retains the data in the
register latched at the
\.
current address.
1 1
1 LATCH ADDRESS
21 -28
DA7 - DAO
In/Out
In the data mode, corresponds to the
register array bits, B7 - BO in the data
mode.
In the address mode, DA3 - DAO are used to
select the register number and DA7 - DA4 to
comp!~s~ the ad~!ess i!1P~ ~ t _ .
I
~5