Owner's manual

34 Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved) DS508F2
EP7312
High-Performance, Low-Power System on Chip
79 SMPCLK 1 Low O SSI1 ADC sample clock
80 FB[1] I PWM feedback input
81 VSSIO Pad Gnd I/O ground
82 FB[0] I PWM feedback input
83 COL[7] 1 High O
Keyboard scanner column
drive
84 COL[6] 1 High O
Keyboard scanner column
drive
85 COL[5] 1 High O
Keyboard scanner column
drive
86 COL[4] 1 High O
Keyboard scanner column
drive
87 COL[3] 1 High O
Keyboard scanner column
drive
88 COL[2] 1 High O
Keyboard scanner column
drive
89 VDDIO Pad Pwr Digital I/O power, 3.3 V
90 TCLK I JTAG clock
91 COL[1] 1 High O
Keyboard scanner column
drive
92 COL[0] 1 High O
Keyboard scanner column
drive
93 BUZ 1 Low O Buzzer drive output
94 D[31] 1 Low I/O Data I/O
95 D[30] 1 Low I/O Data I/O
96 D[29] 1 Low I/O Data I/O
97 D[28] 1 Low I/O Data I/O
98 VSSIO Pad Gnd I/O ground
99 A[27]/DRA[0] 2 Low O
System byte address /
SDRAM address
100 D[27] 1 Low I/O Data I/O
101 A[26]/DRA[1] 2 Low O
System byte address /
SDRAM address
102 D[26] 1 Low I/O Data I/O
103 A[25]/DRA[2] 2 Low O
System byte address /
SDRAM address
104 D[25] 1 Low I/O Data I/O
105 HALFWORD 1 Low O Halfword access select output
106 A[24]/DRA[3] 1 Low O
System byte address /
SDRAM address
107 VDDIO — Pad Pwr Digital I/O power, 3.3 V
108 VSSIO — Pad Gnd I/O ground
109 D[24] 1 Low I/O Data I/O
110 A[23]/DRA[4] 1 Low O
System byte address /
SDRAM address
111 D[23] 1 Low I/O Data I/O
112 A[22]/DRA[5] 1 Low O
System byte address /
SDRAM address
113 D[22] 1 Low I/O Data I/O
114 A[21]/DRA[6] 1 Low O
System byte address /
SDRAM address
115 D[21] 1 Low I/O Data I/O
116 VSSIO Pad Gnd I/O ground
117 A[20]/DRA[7] 1 Low O
System byte address /
SDRAM address
Table 20. 208-Pin LQFP Numeric Pin Listing (Continued)
Pin
No.
Signal
Strength
†
Reset
State
Type Description