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UX-258TH
FO-475TH
FC200 (IC2) Terminal descriptions
CPU Control Interface
MIRQn 135 I HU − Modem interrupt, active low. (Hysteresis In, Internal Pullup.)
SYSCLK 133 I H − System clock. (Hysteresis In.)
TSTCLK 130 O − 123XT Test clock.
Bus Control Interface
A[23:0] [1:6][8:13] O TU 123XT Address bus (24-bit).
[15:20][22:27]
D[7:0] [136:139] I/O TU 123XT Data bus (8-bit).
[141:144]
RDn 128 O − 123XT Read strobe.
WRn 127 O − 123XT Write strobe.
ROMCSn 120 O − 123XT ROM chip select.
CS1n 122 O − 123XT I/O chip select.
CS0n 57 O − 123XT SRAM chip select. (Battery powered.)
MCSn 121 O − 123XT Modem chip select.
SYNC 126 O − 123XT Indicates CPU op code fetch cycle (active high).
REGDMA 124 O − 123XT Indicates REGSEL cycle and DMA cycle.
WAITn 125 O − 123XT Indicates current TSTCLK cycle is a wait state or a halt state.
RASn 113 O − 123XT DRAM row address select. (Battery powered.)
CAS[1:0]n [111:112] O − 123XT DRAM column address select. (Battery powered.)
DWRn 109 O − 123XT DRAM write. (Battery powered.)
Prime Power Reset Logic and Test
DEBUGn 129 I HU − External non-maskable input (NMI).
RESETn 131 I/O HU 2XO XFC3 Reset.
TEST 58 I C − Sets Test mode (Battery powered).
Battery Power Control and Reset Logic
XIN 59 I OSC − Crystal oscillator input pin.
XOUT 60 O − OSC Crystal oscillator output pin.
PWRDWNn 62 I H − Used by external system to indicate loss of power to XFC3.
(Results in
NMI)
BATRSTn 61 I H − Battery power reset input.
WRPROTn 110 O − 1XC (Battery powered.) Write protect during loss of VDD power.
Scanner Interface
START 101 O − 2XS Scanner shift gate control.
CLK1 100 O − 2XS Scanner clock.
CLK1n 99 O − 2XS Scanner clock-inverted.
CLK2 98 O − 2XS Scanner reset gate control (or clock for CIS scanner).
FCS1n/VIDCTL0 96 O − 2XT Flash memory chip select or Video Control signal.
FCS2n/VIDCTL1 97 O − 2XT Flash memory chip select or Video Control signal.
Printer Interface
PCLK 29 O − 3XC Thermal Print Head (TPH) clock, or external DMAACK.
PDAT 30 O − 2XP Serial printing data (to TPH).
PLAT 31 O − 3XP TPH data latch.
STRB[3:0] [33:36] O − 1XP Strobe signals for the TPH.
STRBPOL 37 I C − Sets strobe polarity, active high/low.
Operator Panel Interface
OPO[0]/GPO[8]/ 47 O − 2XL Keyboard/LED strobe [0] or GPO[8] or Scan Motor Power Control
SMPWRCTRL
OPO[1]/GPO[9]/ 46 O − 2XL Keyboard/LED strobe [1] or GPO[9] or Print Motor Power Control
PMPWRCTRL
OPO[2]/GPO[10]/ 44 O − 2XCT Keyboard/LED strobe [2] or GPO[10] or RINGER
RINGER
OPO[3]/GPO[11] 43 O − 2XL Keyboard/LED strobe [3] or GPO[11]
OPO[4]/GPO[12]/ 42 O − 2XL Keyboard/LED strobe [4] or GPO[12] or SSTXD1 (for SSIF1)
SSTXD1
OPO[5]/GPO[13] 40 O − 2XL Keyboard/LED strobe [5] or GPO[13]
OPO[6]/GPO[14] 39 O − 2XL Keyboard/LED strobe [6] or GPO[14]
OPO[7]/GPO[15] 38 O − 2XL Keyboard/LED strobe [7] or GPO[15]
OPI[0]/GPIO[21]/ 52 I/O HU 2XC (Pullup, Hysteresis In) Keyboard return [0] or GPIO[21] or SSRXD1
SSRXD1 (for SSIF1)
OPI[1]/GPIO[22]/ 51 I/O HU 2XC (Pullup, Hysteresis In) Keyboard return [1] or GPIO[22] or SSSTAT1
SSSTAT1 (for SSIF1)
OPI[2]/GPIO[23]/ 50 I/O HU 2XC (Pullup, Hysteresis In) Keyboard return [2] or GPIO[23] or SSCLK1
SSCLK1 (for SSIF1)
Pin Name Pin No. I/O
Input Output Pin Description
Type Type (Note: Active low signals have an "n" pin name ending.)
5 – 3