LPC2292_15 Datasheet, PDF (44/54 Pages) NXP Semiconductors – 16/32-bit ARM microcontrollers; 256 kB ISP/IAP flash with CAN, 10-bit ADC and external memory interface

NXP Semiconductors
LPC2292/2294
16/32-bit ARM microcontrollers with external memory interface
Table 12. External memory interface dynamic characteristics
C_L = 25 pF, T_amb = 40 C
Symbol Parameter
Conditions
Min
Common to read and write cycles
t_CHAV
XCLK HIGH to address valid
-
time
t_CHCSL XCLK HIGH to CS LOW time
-
t_CHCSH XCLK HIGH to CS HIGH
-
time
t_CHANV XCLK HIGH to address
-
invalid time
Read cycle parameters
t_CSLAV
CS LOW to address valid
time
[1] _5
t_OELAV
OE LOW to address valid
time
[1] _5
t_CSLOEL
t_am
CS LOW to OE LOW time
memory access time
5
[2][3] _{(Tcy(CCLK)  (2 + WST1)) +}
(20)
t_am(ibr)
memory access time (initial
burst-ROM)
[2][3] _{(Tcy(CCLK)  (2 + WST1)) +}
(20)
t_am(sbr)
memory access time
(subsequent burst-ROM)
[2][4] _{Tcy(CCLK) + (20)}
t_h(D)
t_CSHOEH
t_OEHANV
data input hold time
CS HIGH to OE HIGH time
OE HIGH to address invalid
time
[5] ₀
5
5
t_CHOEL XCLK HIGH to OE LOW time
5
t_CHOEH XCLK HIGH to OE HIGH
5
time
Write cycle parameters
t_AVCSL
address valid to CS LOW
time
[1] _{Tcy(CCLK)  10}
t_CSLDV
t_CSLWEL
t_CSLBLSL
t_WELDV
t_CSLDV
t_WELWEH
CS LOW to data valid time
CS LOW to WE LOW time
CS LOW to BLS LOW time
WE LOW to data valid time
CS LOW to data valid time
WE LOW to WE HIGH time
5
5
5
5
5
[2] _{Tcy(CCLK)  (1 + WST2)  5}
t_BLSLBLSH BLS LOW to BLS HIGH time
[2] _{Tcy(CCLK)  (1 + WST2)  5}
t_WEHANV
t_WEHDNV
t_BLSHANV
WE HIGH to address invalid
time
WE HIGH to data invalid time
BLS HIGH to address invalid
time
[2] _{Tcy(CCLK)  5}
[2] _{(2  Tcy(CCLK))  5}
[2] _{Tcy(CCLK)  5}
Typ Max
Unit
- 10
ns
- 10
ns
- 10
ns
- 10
ns
- +10
ns
- +10
ns
- +5
ns
--
ns
--
ns
--
ns
--
ns
- +5
ns
- +5
ns
- +5
ns
- +5
ns
--
ns
- +5
ns
- +5
ns
- +5
ns
- +5
ns
- +5
ns
-
T_cy(CCLK)  (1 +
ns
WST2) + 5
-
T_cy(CCLK) 
ns
(1 + WST2) + 5
-
T_cy(CCLK) + 5
ns
- (2  T_cy(CCLK)) + 5 ns
-
T_cy(CCLK) + 5
ns
LPC2292_2294
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 8 — 8 June 2011
© NXP B.V. 2011. All rights reserved.
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