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UM10503
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
1337 of 1441
NXP Semiconductors
UM10503
Chapter 48: 12-bit ADC (ADCHS)
48.6 Register description
Fig 187. ADCHS block diagram
12-bit
ADC
6 : 1
input
mux
12
3
descriptor
table1
descriptor
table2
DMA
AHB
Interrupt
Trigger
ADC_clk
14-bit
descriptor
timer
reset
16word
FIFO
ADC controller
vin_neg
12k
8k5
1.2V
DCINPOS
DCINNEG
ADCHS__NEG
vin_pos
shadow
descriptor tbl1
shadow
descriptor tbl2
Trigger
select
ADCHS_0
ADCHS_1
ADCHS_2
ADCHS_3
ADCHS_4
ADCHS_5
Table 1121.Register overview: 12-bit ADC (base address 0x400F 0000)
Name
Access Address
offset
Description
Reset value
Reference
FLUSH
WO
0x0000
Flushes FIFO
0x00000000
DMA_REQ
R/W
0x0004
Set or clear DMA write request
0x00000001
FIFO_STS
RO
0x0008
Indicates FIFO fill level status
0x00000000
FIFO_CFG
R/W
0x000C
Configures FIFO fill level that triggers
interrupt and packing 1 or 2 samples per
word.
0x00000010
TRIGGER
WO
0x0010
Enable software trigger to start descriptor
processing
0x00000000
DSCR_STS
R/W
0x0014
Indicates active descriptor table and
descriptor entry
0x00000000
POWER_DOWN
R/W
0x0018
Set or clear power down mode
0x00000001
CONFIG
R/W
0x001C
Configures external trigger mode, store
channel ID in FIFO and walk-up recovery
time from power down.
0x00002400
THR_A
R/W
0x0020
Configures window comparator A levels.
0x0FFF0000
THR _B
R/W
0x0024
Configures window comparator B levels.
0x0FFF0000
LAST_SAMPLE0 to
LAST_SAMPLE5
RO
0x0028 to
0x003C
Contains last converted sample of input
M [M=0..5) and result of window
comparator.
0x00000000