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LPC2212 View Datasheet(PDF) - Philips Electronics

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LPC2212 Datasheet PDF : 40 Pages
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Philips Semiconductors
LPC2212/LPC2214
16/32-bit ARM microcontrollers with external memory interface
9. Dynamic characteristics
Table 12: Characteristics
Tamb = 0 °C to +70 °C for commercial, 40 °C to +85 °C for industrial, V18, V3 over specified ranges[1]
Symbol
Parameter
Conditions
Min
Typ[1]
External Clock
fosc
Oscillator frequency supplied by an
external oscillator (signal generator)
1
-
External clock frequency supplied by
an external crystal oscillator
1
-
External clock frequency if on-chip
PLL is used
10
-
External clock frequency if ISP is
used for initial code download
10
-
tC
tCHCX
tCLCX
tCLCH
tCHCL
Port Pins
Oscillator clock period
Clock high time
Clock low time
Clock rise time
Clock fall time
20
-
tc × 0.4
-
tc × 0.4
-
-
-
-
-
tRISE
Port output rise time (except P0.2,
P0.3)
-
10
tFALL
Port output fall time (except P0.2,
P0.3)
-
10
I2C pins
tf
Output fall time from VIH to VIL
20 +
-
0.1 × Cb[2]
[1] Parameters are valid over operating temperature range unless otherwise specified.
[2] Bus capacitance Cb in pF, from 10 pF to 400 pF.
Table 13: External memory interface AC characteristics. CL = 25 pF. Tamb = 40 °C
Symbol
Description
Min
Max
Common to Read and Write Cycles
tCHAVR
XCLK HIGH to Address Valid
-
10
tCHCSL
XCLK HIGH to CS LOW
-
10
tCHCSH
XCLK HIGH to CS HIGH
-
10
tCHANV
XCLK HIGH to Address Invalid
-
10
Read Cycle Parameters
tCSLAV
tOELAVR
tCSLOEL
tAVDV
CS LOW to Address Valid
OE LOW to Address Valid
CS LOW to OE LOW
Memory Access Time (latest of Address
Valid, CS LOW, OE LOW to Data Valid)
5[1]
10
5[1]
10
5
5
(tCYC*(2 + WST1)) + (20) -
Max
Unit
50
30
25
25
1000
-
-
5
5
MHz
MHz
MHz
MHz
ns
ns
ns
ns
ns
-
ns
-
ns
-
ns
Unit
ns
ns
ns
ns
ns
ns
ns
ns
9397 750 13149
Product data
Rev. 02 — 23 December 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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