Samsung SF-530 Service Manual page 93

• KS32C65100 MICROPROCESSOR
1) KS32C65100 MICROPROCESSOR PIN & INTERFACE
Signal
OSCI
OSCO
PLL_FILTER
nRESET
nSLCTIN/GIP[16]
nSTROBE
nAUTOFD/GIP[17]
nINIT/GIP[15]
nACK
BUSY
SELECT
PERROR
nFAULT
PPD[7:0]
SAVRT
SAIN
SAVRB
Samsung Electronics
Pin No. I/O Type
184 I7 KS32C65100 master clock input.
185 O7 KS32C65100 master clock output.
183 I5 PLL filter
Not reset. nRESET is the global reset input for the
182 I4 KS32C65100. For a system reset, nRESET must be held to
low level for at least 65 machine cycles.
Not select information. This input signal is used by parallel
152 I1
port interface to request 'on-line' status information.
Not strobe. The nSTROBE input indicates when valid data is
151 I1
on parallel port data bus, PPD[7:0]
Not auto feed. The nAUTOFD input indicates whether data
on the parallel port data bus, PPD[7:0], is an auto feed
154 I1
command. Otherwise, the bus signals are interpreted as data
only.
Not initialization. The nINIT input signal initializes the parallel
153 I1
port's input control.
Not parallel port acknowledge. The nACK output signal is
159 I1 issued whenever a transfer on the parallel port data bus is
completed.
Parallel port busy. The BUSY output signal indicates that the
158 O1
KS32C65100 parallel port is currently busy.
Parallel port select. The SELECT output signal indicates
156 O1 whether the device connected to the KS32C65100 parallel
port is 'on-line' or 'off-line'.
Parallel port paper error. PERROR output indicates that a
problem exists with the paper in the ink-jet printer. It could
157 O1
indicate that the printer has a paper jam or that the printer
is out of paper.
Not fault. The nFAULT output indicates that an error
condition exists with the printer. This signal can be used to
155 O1
indicate that the printer is out of ink or to inform the user
that the printer is not turned on.
arallel port data bus. This 8-bit, tri-state bus is used to
142~149 I/O2 exchange data between the KS32C65100 and an external
host(peripheral).
2 I6 Top reference voltage for IP ADC
3 I6 Analog input for IP ADC
4 I6 Bottom reference voltage for IP ADC
CIRCUIT DESCRIPTION
Description
Repair Manual
3-3