參數(shù)資料
型號(hào): EP7212-CB-A
廠商: CIRRUS LOGIC INC
元件分類: 微控制器/微處理器
英文描述: HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH LCD CONTROLLER AND DIGITAL AUDIO INTERFACE(DAI)
中文描述: 32-BIT, MROM, 74 MHz, RISC MICROCONTROLLER, PBGA256
封裝: 17 X 17 MM, 1.53 MM HEIGHT, PLASTIC, BGA-256
文件頁數(shù): 99/136頁
文件大?。?/td> 2289K
代理商: EP7212-CB-A
EP7212
DS474PP1
99
t39
t40
SSIRXDA data hold time
SSITXFR and / or SSIRXFR period
All DRAM 36 MHz timings are for EDO DRAM operation.
40
750
40
750
ns
ns
NOTE:
The values for 36 MHz include 1 wait state, the 18 MHz values have 0 wait states.
Symbol
Characteristics
13 MHz
18 MHz
36 MHz
Units
Min
120
Max
Min
70
Max
Min
35
Max
t
nCSRD
Negative strobe (nCS[0:5]) zero
wait state read access time
Negative strobe (nCS[0:5]) zero
wait state write access time
Sequential expansion burst mode
read access time
DRAM cycle time
ns
t
nCSWR
120
70
35
ns
t
EXBST
55
35
35
ns
t
RC
t
RAC
t
RP
t
CAS
t
CP
t
PC
t
CSR
t
RAS
230
-
150
-
150
ns
Access time from RAS
110
-
70
-
50
ns
RAS precharge time
110
-
70
-
50
ns
CAS pulse width
30
-
20
-
10
ns
CAS precharge in page mode
20
-
12
-
10
ns
Page mode cycle time
70
-
45
-
20
ns
CAS set-up time for auto refresh
20
-
15
-
5
ns
RAS pulse width
110
-
80
-
50
ns
NOTE:
All DRAM 36 MHz timings are for EDO DRAM operation.
The values for 36 MHz include 1 wait state, the 18 MHz values have 0 wait
states.
Table 59. Timing Characteristics
Symbol
Parameter
13 MHz
18/36 MHz
Units
Min
Max
Min
Max
Table 58. AC Timing Characteristics
(cont.)
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