U2739M-B Datasheet, PDF (21/69 Pages) ATMEL Corporation – DAB One-Chip Channel- and Source Decoder

6.6 SRAM Interface
6.6.1 SRAM Interface Signal Description
QFP144 QFP100
Pin Name
100
70 SRAM_D7
101
71 SRAM_D6
103
72 SRAM_D5
104
73 SRAM_D4
106
74 SRAM_D3
107
75 SRAM_D2
109
76 SRAM_D1
110
77 SRAM_D0
112
78 SRAM_WR
113
79 SRAM_OE
114
80 SRAM_A18
116
81 SRAM_A17
117
82 SRAM_A16
119
83 SRAM_A15
120
84 SRAM_A14
123
86 SRAM_A13
124
87 SRAM_A12
126
88 SRAM_A11
127
89 SRAM_A10
129
90 SRAM_A9
130
91 SRAM_A8
132
92 SRAM_A7
133
93 SRAM_A6
136
95 SRAM_A5
137
96 SRAM_A4
139
97 SRAM_A3
140
98 SRAM_A2
142
99 SRAM_A1
143
100 SRAM_A0
Signal Description
SRAM data bit 7
SRAM data bit 6
SRAM data bit 5
SRAM data bit 4
SRAM data bit 3
SRAM data bit 2
SRAM data bit 1
SRAM data bit 0
SRAM write signal
SRAM output enable
SRAM address bit 18
SRAM address bit 17
SRAM address bit 16
SRAM address bit 15
SRAM address bit 14
SRAM address bit 13
SRAM address bit 12
SRAM address bit 11
SRAM address bit 10
SRAM address bit 9
SRAM address bit 8
SRAM address bit 7
SRAM address bit 6
SRAM address bit 5
SRAM address bit 4
SRAM address bit 3
SRAM address bit 2
SRAM address bit 1
SRAM address bit 0
U2739M-B
Pad Type
PRB04TZ
PRB04TZ
PRB04TZ
PRB04TZ
PRB04TZ
PRB04TZ
PRB04TZ
PRB04TZ
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
PRO04T
Dir.
inout
inout
inout
inout
inout
inout
inout
inout
out
out
out
out
out
out
out
out
out
out
out
out
out
out
out
out
out
out
out
out
out
5 V Tol.
x
x
x
x
x
x
x
x
6.6.2 SRAM Interface Descriptions
For time de-interleaving and further task an external
static random access memory of 4 MB is necessary. The
organization of the SRAM is 512 k × 8 bit.
Due to the high data rates a fast SRAM with a access time
of 18 ns or below is necessary.
Rev. A1, 22-May-01
21 (69)