OM13013,598 NXP Semiconductors, OM13013,598 Datasheet - Page 291
OM13013,598
Manufacturer Part Number
OM13013,598
Description
BOARD DEMO IAR LPC1227 JLINKLITE
Manufacturer
NXP Semiconductors
Series
-r
Specifications of OM13013,598
Design Resources
LPC122x-SK Brd Schematic
Processor To Be Evaluated
LPC1227
Processor Series
LPC122x
Data Bus Width
32 bit
Interface Type
UART, SSP, SPI, I2C
Cpu Core
ARM Cortex-M0
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Operating Supply Voltage
3 V to 3.6 V
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
568-6885
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UM10441
User manual
18.6.2 Voltage ladder register
Table 274. Comparator control register (CMP, address 0x4005 4000) bit description
This register enables the voltage ladder for the comparator reference input. The reference
input VREF_CMP is programmable in 32 levels from V
Table 275. Voltage ladder register (VLAD, address 0x4005 4004) bit description
Bit
19:17 CMP1_VM_CTRL
20
21
22
31:23 -
Bit
0
5:1
6
31:7
Symbol
VLADEN
VSEL
VLADREF
-
Symbol
INTCLR
CMP0STAT
CMP1STAT
All information provided in this document is subject to legal disclaimers.
Value Description
0
1
0
1
Rev. 1 — 15 February 2011
Value
0x0
0x1
0x2
0x3
0x4
0x5
0x6
0x7
Voltage ladder enable
Voltage ladder disabled.
Voltage ladder enabled.
Voltage ladder value. The reference voltage Vref depends on
the setting of bit 6 in this register (either V
pin VREF_CMP):
0000 = V
0001 = 1 × Vref/31
0010 = 2 × Vref/31
...
11111 = Vref
Voltage reference select
VREF_CMP pin
V
Unused
DD(3V3)
Description
Selection of comparator 1, negative voltage (VM)
input channel.
Voltage ladder output
ACMP1_I0
ACMP1_I1
ACMP1_I2
ACMP1_I3
ACMP0_I0
ACMP0_I1
BOD 0.9 V band gap
Interrupt clear bit. Setting this bit to one clears the
comparator interrupt.
Comparator 0 status. This bit reflects the state of the
comparator 0 output.
Comparator 1 status. This bit reflects the state of the
comparator 1 output.
Reserved.
pin
SS
Chapter 18: LPC122x Comparator
SS
to VREF_CMP = 3.3 V.
DD(3V3)
or voltage on
UM10441
© NXP B.V. 2011. All rights reserved.
291 of 442
Reset
value
0
0
1
0
Reset
value
000
0
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