Philips LPC213 Series User Manual page 195

Philips Semiconductors
Volume 1
Table 163: A/D Control Register (AD0CR - address 0xE003 4000 and AD1CR - address 0xE006 0000) bit description
Bit Symbol Value Description
19:17 CLKS
000
001
010
011
100
101
110
111
20 -
21 PDN 1
0
23:22 -
26:24 START
000
001
010
011
100
101
110
111
27 EDGE
1
0
31:28 -
User manual
This field selects the number of clocks used for each conversion in Burst mode, and the
number of bits of accuracy of the result in the LS bits of ADDR, between 11 clocks
(10 bits) and 4 clocks (3 bits).
11 clocks / 10 bits
10 clocks / 9bits
9 clocks / 8 bits
8 clocks / 7 bits
7 clocks / 6 bits
6 clocks / 5 bits
5 clocks / 4 bits
4 clocks / 3 bits
Reserved, user software should not write ones to reserved bits. The value read from a
reserved bit is not defined.
The A/D converter is operational.
The A/D converter is in power-down mode.
Reserved, user software should not write ones to reserved bits. The value read from a
reserved bit is not defined.
When the BURST bit is 0, these bits control whether and when an A/D conversion is
started:
No start (this value should be used when clearing PDN to 0).
Start conversion now.
Start conversion when the edge selected by bit 27 occurs on
P0.16/EINT0/MAT0.2/CAP0.2 pin.
Start conversion when the edge selected by bit 27 occurs on
P0.22/TD3/CAP0.0/MAT0.0 pin.
Start conversion when the edge selected by bit 27 occurs on MAT0.1.
Start conversion when the edge selected by bit 27 occurs on MAT0.3.
Start conversion when the edge selected by bit 27 occurs on MAT1.0.
Start conversion when the edge selected by bit 27 occurs on MAT1.1.
This bit is significant only when the START field contains 010-111. In these cases:
Start conversion on a falling edge on the selected CAP/MAT signa.
Start conversion on a rising edge on the selected CAP/MAT signal.
Reserved, user software should not write ones to reserved bits. The value read from a
reserved bit is not defined.
Rev. 01 — 24 June 2005
UM10120
Chapter 16: A/D Converter
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Reset
value
000
NA
0
NA
0
0
NA
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