Oki TF-300P, Field Service Manual, Page: 42 / 137

6-3
Pin Name Pin No. I/O
Input
Type
Output
Type
Pin Description
(Note: Active low signals have an “n” pin name ending.)
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
/ DMAACK
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
/DMARQ
37 I C -- Sets strobe polarity, active high/low , or external DMA
request.
Operator Panel Interface
OPO[5]/GP
O[13] 40 O -- 2XL Keyboard/LED strobe [5] or GPO[13]
OPO[6]/GP
O[14] 39 O -- 2XL Keyboard/LED strobe [6] or GPO[14]
OPO[7]/GP
O[15] 38 O -- 2XL Keyboard/LED strobe [7] or GPO[15]
OPI[0]/GPI
O[21]/SSR
XD1 52 I/O HU 2SC (Pullup, Hysteresis In.) Keyboard return [0] or GPIO[21] or
SSRXD1 (for SSIF1)
OPI[1]/GPI
O[22]/SSS
TAT1 51 I/O HU 2SC (Pullup, Hysteresis In.) Keyboard return [1] or GPIO[22] or
SSSTAT1 (for SSIF1)
OPI[2]/GPI
O[23]/SSC
LK1 50 I/O HU 2SC (Pullup, Hysteresis In.) Keyboard return [2] or GPIO[23] or
SSCLK1 (for SSIF1)
OPI[3]/GPI
O[24] 49 I/O HU 2SC (Pullup, Hysteresis In.) Keyboard return [0] or GPIO[21]
LEDCTL 55 O -- 4XC Indicates outputs OPO [7:0] are for LEDs.
LCDCS 54 O -- 1XC LCD chip select.
General Purpose I/O
GPIO[0] 94 I/O H 2XC (Hysteresis In) GPIO[0].
GPIO[1]
/SASTXD
93 I/O H 2XC (Hysteresis In) GPIO[1] or SASTXD (for SASIF).
GPIO[2]
/SASRXD
92 I/O H 2XC (Hysteresis In) GPIO[2] or SASRXD
GPIO[3]
/SASCLK
91 I/O H 2XC (Hysteresis In) GPIO[3] or SASCLK
GPIO[4]
/CPCIN
90 I/O H 2XC (Hysteresis In) GPIO[4] or Calling Party Control Input
GPIO[5
/SSCLK2
89 I/O H 2XC (Hysteresis In) GPIO[5] or SSCLK2
GPIO[6]
/SSTXD2
87 I/O H 2XC (Hysteresis In) GPIO[6] or SSTXD2 (for SSIF2).
GPIO[7]
/SSRXD2
86 I/O H 2XC (Hysteresis In) GPIO[7] or SSRXD2 (for SSIF2)
GPIO[8]
/FWRn
85 I/O H 2XC
(Hysteresis In) GPIO[8] or flash write enable signal for
NAND-type flash memory.