参数资料
型号: EA-OEM-410
厂商: Embedded Artists
文件页数: 53/57页
文件大小: 0K
描述: KIT LPC3250 259 WITH QVGA
标准包装: 1
类型: MCU
适用于相关产品: LPC3250
所含物品: 基板,线缆,OEM 板,序列号
LPC3220_30_40_50
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 20 October 2011
57 of 79
NXP Semiconductors
LPC3220/30/40/50
16/32-bit ARM microcontrollers
11. Dynamic characteristics
11.1 Clocking and I/O port pins
[1]
Parameters are valid over operating temperature range unless otherwise specified.
[2]
After supply voltages are stable
[3]
Supplied by an external crystal.
11.2 Static memory controller
Table 11.
Dynamic characteristics
Tamb = 40 C to +85 C, unless otherwise specified.[1]
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Reset
tw(RESET)ext
external RESET pulse width
-
ms
External clock
fext
external clock frequency
[3] 113
20
MHz
Port pins
tr
rise time
-
5
-
ns
tf
fall time
-
5
-
ns
Table 12.
Dynamic characteristics: static external memory interface
CL =25 pF, Tamb =20 C, VDD(EMC) = 1.8 V, 2.5 V, or 3.3 V.
Symbol
Parameter
Notes Min
Typ
Max
Unit
Common to read and write cycles
TCLCL
clock cycle time
[1] 7.5
9.6
-
ns
tCSLAV
CS LOW to address valid time
-
0
-
ns
Read cycle parameters
tOELAV
OE LOW to address valid time
WAITOEN T
CLCL
-ns
tBLSLAV
BLS LOW to address valid time
WAITOEN T
CLCL
-ns
tCSLOEL
CS LOW to OE LOW time
-
0 + WAITOEN
T
CLCL
-ns
tCSLBLSL
CS LOW to BLS LOW time
0 + WAITOEN
T
CLCL
-ns
tOELOEH
OE LOW to OE HIGH time
[2][3] -(WAITRD
WAITOEN + 1) T
CLCL
-ns
tBLSLBLSH
BLS LOW to BLS HIGH time
[2][3] -(WAITRD
WAITOEN + 1) T
CLCL
-ns
tsu(DQ)
data input/output set-up time
[6] -8.4
-
ns
th(DQ)
data input/output hold time
-
ns
tCSHOEH
CS HIGH to OE HIGH time
-
0
-
ns
tCSHBLSH
CS HIGH to BLS HIGH time
-
0
-
ns
tOEHANV
OE HIGH to address invalid time
-
1
T
CLCL
-ns
tBLSHANV
BLS HIGH to address invalid time
-
1
T
CLCL
-ns
Write cycle parameters
tCSLDV
CS LOW to data valid time
-
0
-
ns
tCSLWEL
CS LOW to WE LOW time
[4] -(WAITWEN + 1)
T
CLCL
-ns
tCSLBLSL
CS LOW to BLS LOW time
[4] -(WAITWEN + 1)
T
CLCL
-ns
tWELDV
WE LOW to data valid time
(WAITWEN + 1) T
CLCL
-ns
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