參數(shù)資料
型號: MCIMX281AVM4B
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 454 MHz, RISC PROCESSOR, PBGA289
封裝: 14 X 14 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MAPBGA-289
文件頁數(shù): 38/72頁
文件大小: 915K
代理商: MCIMX281AVM4B
i.MX28 Applications Processors Data Sheet for Automotive Products, Rev. 1
Freescale Semiconductor
43
Table 48. NFC Timing Parameters1
1 The Flash clock maximum frequency is 100 MHz.
2)GPMI’s output timing could be controlled by module’s internal register, say
HW_GPMI_TIMING0_ADDRESS_SETUP,HW_GPMI_TIMING0_DATA_SETUP,HW_GPMI_TIMING0_DATA_HOLD, this AC
timing depends on these registers’ setting. In the above table we use AS/DS/DH representing these settings each.
3)AS minimum value could be 0, while DS/DH minimum value is 1.
ID
Parameter
Symbol
Timing
T = GPMI Clock Cycle
Example Timing for
GPMI Clock
≈ 100MHz
T = 10ns
Unit
Min.
Max.
Min.
Max.
NF1
CLE setup time
tCLS
(AS+1)*T
10
ns
NF2
CLE hold time
tCLH
(DH+1)*T
20
ns
NF3
CEn setup time
tCS
(AS+1)*T
10
ns
NF4
CE hold time
tCH
(DH+1)*T
20
ns
NF5
WE pulse width
tWP
DS*T
10
ns
NF6
ALE setup time
tALS
(AS+1)*T
10
ns
NF7
ALE hold time
tALH
(DH+1)*T
20
ns
NF8
Data setup time
tDS
DS*T
10
ns
NF9
Data hold time
tDH
DH*T
10
ns
NF10
Write cycle time
tWC
(DS+DH)*T
20
ns
NF11
WE hold time
tWH
DH*T
10
ns
NF12
Ready to RE low
tRR
(AS+1)*T
10
ns
NF13
RE pulse width
tRP
DS*T
10
ns
NF14
READ cycle time
tRC
(DS+DH)*T
20
ns
NF15
RE high hold time
tREH
DH*T
10
ns
NF16
Data setup on read
tDSR
N/A
10
ns
NF17
Data hold on read
tDHR
N/A
10
ns
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