Service manual
XFCR-MVP (IC4) Terminal descriptions
Pin Name Pin No. I/O
Input
Type
Output
Type
Pin Description
Operator Panel Interface
OPO[7:0] [38:40][42:44]
[46:47]
O − 2XL Keyboard/LED strobe [7:0].
OPI[3:0] [49:52] I HU − Keyboard return [3:0]. (Pullup. Hysteresis In.)
LEDCTL 55 O − 4XC Indicates outputs OPO [7:0] are for LEDs.
LCDCS 54 O − 1XC LCD chip select.
General Purpose I/O
GPIO[7:0]/
VID[7:0]
[86:87][89:94] I/O H 2XC Programmable: GPIO (8 lines) or video data bus.
GPIO[10:8]/
VDC[2:0]
[83:85] I/O H 2XC Programmable: GPIO (3 lines) or video data control signals.
GPIO11/BE/
SERINP
82 I/O H 1XC Programmable: GPIO line, Bus Enable, serial data input (Autobaud).
GPIO12/
CS2n/SCLK
80 I/O H 2XC Programmable: GPIO line, I/O chip select or SCLK (SART).
GPIO13/
CS3n/TXD
79 I/O H 2XC Programmable: GPIO line, I/O chip select or TXD (SART).
GPIO14/
CS4n/RXD
78 I/O H 2XC Programmable: GPIO line, I/O chip select or RXD (SART).
GPIO15/
CS5n
77 I/O H 2XC Programmable: GPIO line or I/O chip select.
GPIO16/
IRQ8
76 I/O H 1XC Programmable: GPIO line or active high interrupt.
GPIO17/
IRQ5n
75 I/O H 1XC Programmable: GPIO line or active low interrupt.
GPIO18/
IRQ10n
74 I/O H 1XC Programmable: GPIO line or active low interrupt.
GPIO[19]/RDY
/SEROUT
73 I/O H 1XC Programmable: GPIO line, Ready or Serial out (Autobaud).
Miscellaneous
SM[3:0]/
GPO[7:4]
[103:106] O − 1XC Programmable: scan motor control pins or GPO pins.
PM[3:0]/
GPO[3:0]
[115:118] O − 1XC Programmable: print motor control pins or GPO pins.
TONE 119 O − 1XC Tone output signal.
Power, Reference Voltages, Ground
−Vref 66 I −VR − Negative Reference Voltage for Video A/D.
+Vref 68 I +VR − Positive Reference Voltage for Video A/D.
ADGA 69 VADG A/D Analog Ground.
ADVA 70 VADV A/D Analog Power.
ADGD 72 VADG A/D Digital Ground.
ADVD 71 VADV A/D Digital Power.
VIN 67 I VA − Analog Video A/D input.
THADI 65 I TA − Analog Thermal A/D input.
VSS (12) 134, 132, 108,
95, 88, 64, 56,
53, 45, 28, 21,7
Digital Ground.
VDD (8) 140, 123, 102,
81, 48, 41, 32,
14
Digital Power.
VDRAM 114 Battery power for DRAM refresh.
VBAT 63 Battery Power, for RTC and SRAM.
No Connection
NC 107 No connection.
UX-510U/UX-510C/UX-500U
UX-500C/FO-1460U
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