Panasonic KX-FC255CX-S, Service Manual

Page: 231 / 256

231
KX-FC255CX-S
20.2.2. IC10: ASIC (Digital Board)
INPUT PORT
SWITCHING OUTPUT PIN/INPUT PORT
OUTPUT PORT
PORT ENABLE TO SWITHING INPUT/OUTPUT
48 P0[1] URX General purpose
I/O port input Data to
UART pull down I URX I voltage convert with
R/R ,, 3.3V->3.0V
47 P0[0] UTX General purpose
I/O port UART DATA
output selectable
pullup I_PU UTX O connect to ASIC
UART RXD
PIN NO. SIGNAL RESET STATE 533 I/O
19 CPC I HOOK I
20 RVN I PDET I
43 XWAIT/IP60 I PTOP I
119 STBNP I FLMDET I
136 KRXD/IP KRXD I KRXD I
PIN NO. SIGNAL RESET STATE 533 I/O
124 RXE/IP04 HIGH RXE O
131 TXE/IP14 HIGH TXE O
PIN NO. SIGNAL RESET STATE 533 I/O
17 F2/OP50 F2 LOW XMDMRST O
18 FR/OP51 FR LOW HEADON O
46 XOPRBE/MUX/OP53 XOPRBE HIGH XOPRBE O
47 ADR13/OP ADR13
48 ADR14/OP ADR14
49 ADR15/OP ADR15
65 XRESCS2/OP71 XRESCS2 HIGH — O
101 RBA5/OP RBA5 A18
133 KLATCH KLATCH KLATCH O
PIN NO. SIGNAL RESET STATE 533 I/O
21 IRDATXD/IOP81 TXD LOW CHK_IN2 I/O
22 IRDARXD/IOP80 RXD INPUT F_TXMUTE O
23 TXD/IOP30 IOP INPUT TXD O
24 RXD/IOP31 IOP INPUT RXD I
25 XRTS/IOP32 IOP INPUT XRTS O
26 XCTS/IOP33 IOP INPUT XCTS I
34 FMEMDO/IOP26 IOP INPUT LEDON O
39 MIDAT/IOP45 IOP INPUT PWRCNT O
40 MICLK/IOP46 IOP INPUT OPERST O
41 MILAT/IOP47 IOP INPUT NISHI1 I
42 20KOSC/IOP56 IOP INPUT CCONT O
44 XHSTRD/IOP40 IOP INPUT MURA1 O
45 XHSTWR/IOP41 IOP INPUT TX2-2 O
62 XRAS/IOP42 IOP INPUT RAS O
63 XCAS1/IOP43 IOP INPUT CAS O
64 XCAS2/IOP44 IOP INPUT RCONT O
102 RBA6/IOP RBA6 A19
120 RM0/IOP00 RM0 LOW RM0
121 RM1/IOP01 RM1 LOW RM1
122 RM2/IOP02 RM2 LOW RM2
123 RM3/IOP03 RM3 LOW RM3
125 TM0/IOP10 TM0 LOW TM0 O
128 TM1/IOP11 TM1 LOW TM1 O
129 TM2/IOP12 TM2 LOW TM2 O
130 TM3/IOP13 TM3 LOW TM3 O
PIN
NO.
PIN NAME DESCRIPTION PIN STATEMENT ASSIGNMENT
1 2 3 4 1 2 Pull up or
down
Reset
state
PIN
NAME
DIR Connection