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Circuit Description
Table 1-1 KS32C6100 Signal Descriptions (Cont.)
SIGNAL
PIN No.
SIO_RXD
153
SIO_TXD
152
nSELECTIN
11
nSTROBE
12
n A U TO F D
1 3
nINITIAL
14
n A C K
1 5
BUSY
1 6
SELECT
17
PERROR
1 8
nFA U LT
1 9
PPD[7:0]
3~10
C O M C L K
158
CnPBSY
160
C n P M S G
161
CnEBSY
162
5-12
Type
I
Receive data input for the serial I/O. Rxd is the SIO's input signal for
r eceiving serial data.
O
Transmit data input for the serial I/O. TXD is the SIO's output for
transmitting serial data.
I
Not select information. This input signal is used by parallel port
i n t e r f a c e t o request "on-line" status information.
I
Not strobe. The nSTROBE input indicates when valid data is present on
the parallel port data bus, PPD[7:0].
I
Not autofeed. The nAUTOFD input indicates whether data on the
parallel port data bus, PPD[7:0], is an autofeed command.
Otherwise, the bus signal are i nt e rp reted as data only.
I
N o t i n i t i a l i z a t i o n .
This input signal initializes the parallel port's input contro l .
O
Not parallel port acknowledge. The nACK output signal is issued
whenever a transfer on the parallel port data bus is completed.
O
Parallel port busy. The BUSY output signal indicates
that the KS32C6100 parallel port is currently busy.
O
Parallel port select. The SELECT output signal indicates
whether the device connected to the KS32C6100 parallel port is
"on-line" or "off - l i n e " .
O
Parallel port paper erro r. PERROR output indicates that a problem exists
with the paper in the laser printer. It could indicate that the printer has a
paper jam or that the printer is out of paper.
O
Not fault. The nFA U LT output indicates that an error condition exists
with the laser printer. This signal can be used to indicate that the printer
is out of toner or to inform the user that the printer is not turned on.
I/O
Parallel port data bus. This 8-bit, tri-state bus is used to exchange data
between the KS32C6100 and an external host (peripheral).
O
Command clock. COMCLK is used to synchronize command data that
the KS32C6100 sends to the printer engine, as well as the status
messages that the KS32C6100 re c e i v e s f rom the printer engine.
Whenever the KS32C6100 re c e i v e s s t a t u s d a t a , i t s e l e c t s i t s e l f
(COMCLK) as the source of the synchronization signal. Whenever the
KS32C6100 sends a command, the data is synchronized with COMCLK.
O
Not command busy. This output signal indicates that the KS32C6100 is
sending command data to the printer engine. When CnPBSY goes active,
the command data, which is COMCLK, is sent to the engine.
O
Not command message. The CnPMSG output is used to send a one-byte
command, synchronized with COMCLK, to the printer engine.
The command data from the KS32C6100 is sent MSB-first.
I
Not engine busy. This signal indicates whether or not the laser printer
engine ready to send a 1-byte status message in response to a command
f rom the KS32C6100. When CnEBSY i s a c t i v e , t h e S TA TUS data is sent,
synchronized with COMCLK.
Description
Samsung Electronics
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