Sharp FO-77 Service Manual page 54

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