Sony BVH-2000, Operation And Maintenance Manual

Page: 321 / 505

5-6-9. System Control/TC Board Interface
The system control system controls the read out and presetting
of the timer-l , timer-Z, user's bit
time data.
The preset data, specified by the keys on the control panel, are
stored addresses A008H AOOFH of the common
memory by the SY-79 CPU. The stored data are read out by the
SY-80 CPU and controls
code board.
The SY-80 CPU reads out the various data from the time code
board
field field and stores the common memory.
Furthermore, the SY-80 CPU generates the control panel's
data and data.
SYSTEM CONTROL TO TIME CODE READER/GENERATOR INTERFACE
1
4
z
o
~
<!
ex:
w
c,
o
LL
o
>-
ex:
o
w
I
I-
ui
CONTROL PANEL
,.-
--------.,
: KEY BOARD
L
.J
1. Data Presetting
The preset data, specified by the keyboard on the control panel,
are stored by the SY-79 CPU in the 8-byte area spanning
addresses A008H through AOOFHof the common memory as the
timer control data (TMC).
There are four types of TMC data: TMCO, 1, 2 and 3. They are
allotted as follows:
TMCO: Timer-l
TMCI: Timer-2
TMC2: User's Bit
TMC3: Time Code
The data are counter numbers which have
stored the values for presetting and by the 1-bit preset
command.
SYSTEM CONTROL SYSTEM
TIMER CONTROL DATA IN COMMON MEMORY
A008H TMCO
ADDRESS LABEL BITS
TCG
HOLD
t-----+---t----L-~--L--.---'-_-L..-_---'----'--_i
A009H TMCO+l COUNTER NUMBER( 24H )
AOOAH TMCl
AOOBH TI1Cl+l
AOOD
H
TMC2+1
COUNTER NUMBER( 25" )
COUNTER NUMBER( 27H )
AOOE
M
TMC3
AOOFH TI1C3+l
5-6-1
COUNTER NUMBER( 26M)
BVH-2000(U/C)/PS/PM
BVH-2180(U/C)/PS/PM