FO-77U
UX-66U
5 – 8
FM209 (IC4) Hardware Interface Signals
Pin Signals – 128-Pin TQFP
Pin No.
Signal Name
I/O Type
Pin Description
72
SPKRM P
O
Speaker Interface Output
73
AVDD P
PWR
5V Digital power for IA
74
NC
—
No Connection
75
ICLK P
MI
Modem Interconnect
76
MCLK S/NC
MI
Modem Interconnect
77
VDD2
PWR
3.3V Digital Supply for DSP
78
D7
IB/OC
Host Parallel Interface
79
D6
IB/OC
Host Parallel Interface
80
D5
IB/OC
Host Parallel Interface
81
D4
IB/OC
Host Parallel Interface
82
D3
IB/OC
Host Parallel Interface
83
D2
IB/OC
Host Parallel Interface
84
DGND2
GND
DSP Digital Ground
85
VDD3
PWR
3.3V Digital Supply for DSP
86
D1
IB/OC
Host Parallel Interface
87
DGND3
GND
DSP Digital Ground
88
D0
IB/OC
Host Parallel Interface
89
CSBR#
IB
Host Parallel Interface
90
WRITE#
IB
Host Parallel Interface
91
CS#
IB
Host Parallel Interface
92
READ#
IB
Host Parallel Interface
93
GPI2
IA
General purpose input
94
GPI3
IA
General purpose input
95
GPI4
IA
General purpose input
96
GPI5
IA
General purpose input
97
GPI6
IA
General purpose input
98
GPI7
IA
General purpose input
99
GPO7
OC
General purpose output
100
VDD4
PWR
3.3V DSP Digital Power
101
GPO6
OC
General purpose output
102
GPO5
OC
General purpose output
103
RESERVED
MI
Modem Interconnect
104
GPO4
OC
General purpose output
105
GPO3
OC
General purpose output
106
DGND4
GND
DSP Digital Ground
107
CTS#
OB
DTE Serial Interface
108
IRQ1#
OB
Interrupt request
109
GPO2
OC
General purpose output
110
GPO1
OC
General purpose output
111
GPO0
OC
GPO0 (IA reset)
112
VDD5
PWR
3.3V DSP Digital Power
113
VGG
PWR
5V DSP Digital
114
DGND5
GND
DSP Digital Ground
115
RESET#
IB
External reset
116
XTALI
I
Crystal in
117
XTALO
O
Crystal out
118
RESERVED
MI
Modem Interconnect
119
XCLK
OB
X clock output
120
GPI1
IA
General purpose input
121
IRQ2#
OA
Interrupt request
122
SR3IN
MI
Modem Interconnect
123
RESERVED
MI
Modem Interconnect
124
RESERVED
MI
Modem Interconnect
125
DGND6
GND
DSP Digital Ground
126
DVAA
PWR
3.3V DSP analog power
127
AGND5
GND
DSP Analog Ground
128
RESERVED
MI
Modem Interconnect
Notes:
I/O types: MI = Modem interconnect.
IA, IB, = digital input
OA, OB, OC = digital output
I = analog input
O = analog output
P Signals: Primary IA
S Signals: Secondary IA
Reserved = No external connection allowed.
Summary of Contents for FO-77
Page 65: ...FO 77U UX 66U Control PWB parts layout Top side 6 7 ...
Page 66: ...FO 77U UX 66U Control PWB parts layout Bottom side 6 8 ...
Page 69: ...FO 77U UX 66U TEL LIU PWB parts layout Top side 6 11 ...
Page 70: ...FO 77U UX 66U 6 12 TEL LIU PWB parts layout Bottom side ...
Page 72: ...FO 77U UX 66U Power supply PWB parts layout 6 14 RDENT2142XHZZ F2 ...
Page 97: ...FO 77U UX 66U 14 M E M O ...