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Operation
[Initialization at start-up time]
• It takes about 10 seconds for the PC block (AT) to
complete start-up procedures. When the start-up is
completed, PC block (AT) sends data to Keyboard IF
Block (KBIF) to let it know of the completion, and at the
same time let the buzzer sound so that the operator
knows the CSP-5000E is ready for operation. Keyboard
IF Block (KBIF) transfers information on the completion
to the keyboard.
• PC block (AT) transfers the initial data to the input board
(IPM-77), the output board (OPM-11), and Keyboard IF
Block (KBIF) as an initialization process for the start-up,
according to the backup data stored in SRAM (IC639).
• Keyboard IF Block (KBIF) initializes the data
communication control IC (IC617, IC623, IC629,
IC635) as an initialization process, and waits for
information on completion.
[Circuit performance at non-operation]
• PC block (AT) communicates with the keyboard through
Keyboard IF Block (KBIF) at predetermined intervals
and watches keyboard performance.
[Data communication with keyboard
(Keyboard IF Block (KBIF))]
• When the keyboard is actuated, the keyboard sends
commands to the CSP-5000E keyboard port. The data
communication control IC (IC617, IC623, IC629,
IC635) of Keyboard IF Block (KBIF) sends priority
signals to CPU (IC630) each time data of 1 byte are
received. When the reception of data row is completed, it
sends acknowledgment commands to the keyboard and
becomes ready for reception of the following data. It also
decodes commands and performs data processing
required. The data processing is conducted
simultaneously for eight channels available at the
keyboard port.
• If reception data are the PTZ command control,
Keyboard IF Block (KBIF) sends data to the input board
(IPM-77) through the serial I/O KB BUS of CPU. This
data transmission occurs during the priority signal
processing of VD/2. If reception data are commands for
other modules, IF Block (KBIF) sends data to the PC
block (AT) through the Dual Port RAM (IC618).
Otherwise, Keyboard IF Block (KBIF) processes
reception data by itself.
5-4
• If Keyboard IF Block (KBIF) receives data from PC
block (AT) through the Dual Port RAM (IC618), it
transfers them to the keyboard, answers them back to PC
block (AT), or processes them within Keyboard IF Block
(KBIF), depending on the data received. The data
communication control IC (IC617, IC623, IC629,
IC635) of Keyboard IF Block (KBIF) sends priority
signals to the keyboard each time data of 1 byte are
processed, similarly to the data reception.
• The data communication with PC block (AT) is achieved
by the data processing of the priority signals (IRQ) that
is generated when PC block (AT) writes data in the Dual
Port RAM (IC618).
• Keyboard IF Block (KBIF) holds the A/D-converted
data on lithium battery's remaining power, and sends
them to PC block (AT), if necessary.
[Data communication with modules
(PC block (AT))]
• PC block (AT) receives data from such modules as IPM,
OPM, KBIF, and CT, processes the data if required, and
sends them to the appropriate modules. This data
processing is performed at pulse fall time of the VD/2
signal as priority signal processing. At the priority signal
processing, PC block (AT) sees if data arrive from the
modules, and if any, receives them accordingly. Then, if
PC block (AT) needs to send the data to the modules, it
does so accordingly.
• Depending on data received, PC block (AT) renews what
is written in the back-up SRAM (IC639). The SRAM is
located in Keyboard IF Block (KBIF) and PC block
(AT) has no direct access to it, and is unable to control
the SRAM. PC block (AT), therefore, performs renewal
operation by sending SRAM-access commands to
Keyboard IF Block (KBIF).
• PC block (AT) watches keyboard performance through
Keyboard IF Block (KBIF) at predetermined intervals
and, if it fails communicating with the keyboard, resets
the menu operation data and the log-on data at the
keyboard port.
• PC block (AT) watches power left in the backup battery
on Keyboard IF Block (KBIF). When the battery power
becomes less than specified, PC block (AT) sends
commands to the keyboard through Keyboard IF Block
(KBIF) so that the CSPK-5000E's LCD indicates a
warning.
• PC block (AT) conducts polling on the multi-picture
board when the board is used.
• In addition, PC block (AT) records the histories of
communication data with the modules, and analyzes and
processes test commands used in the test mode.
CSP-5000E
CSPK-5000E
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