AT89LP51RC2 Atmel Corporation, AT89LP51RC2 Datasheet - Page 171
AT89LP51RC2
Manufacturer Part Number
AT89LP51RC2
Description
Manufacturer
Atmel Corporation
Specifications of AT89LP51RC2
Flash (kbytes)
32 Kbytes
Max. Operating Frequency
20 MHz
Cpu
8051-1C
Max I/o Pins
42
Spi
1
Twi (i2c)
1
Uart
1
Adc Channels
7
Adc Resolution (bits)
10
Adc Speed (ksps)
153.8
Sram (kbytes)
1.375
Self Program Memory
API
Operating Voltage (vcc)
2.4 to 5.5
Timers
4
Isp
SPI/OCD/UART
Watchdog
Yes
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Note:
Table 21-4.
3722A–MICRO–10/11
Symbol
ACON
IREF
DIFF
TRG
ACS
2-0
DADL = ACH
Not Bit Addressable
Bit
1-0
1. V
TEMP
Function
Analog Input Connect
When cleared, the analog inputs are disconnected from the ADC. When set, the analog inputs selected by ACS
connected to the ADC. ACON must be zero when changing the input channel multiplexor (ACS
Internal Reference Enable
When set, the DADC uses the internal voltage reference. When cleared the DADC uses VDD for its reference.
Differential Mode Enable
Set to configure the ADC in differential mode. Clear to configure the ADC in single-ended mode.
Trigger Select
TRG1
0
0
1
1
ADC Channel Select
DIFF
0
0
0
0
0
0
0
0
1
1
1
1
1
DADL
ADC.7
is provided by the temperature sensor when IREF = 1. Otherwise V
7
– DADC Data Low Register
TRG0
0
1
0
1
ACS2
0
0
0
0
1
1
1
1
0
0
0
0
1
ADC.6
6
Trigger
Software (GO bit)
Timer 0 Overflow
Timer 1 Overflow
Timer 2 Overflow
ACS1
0
0
1
1
0
0
1
1
0
0
1
1
X
ADC.5
ACS0
0
1
0
1
0
1
0
1
0
1
0
1
X
5
V+
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
V
P0.6
P0.0
P0.2
P0.4
reserved
reserved
AT89LP51RB2/RC2/IC2 Preliminary
ADC.4
TEMP
4
(1)
V-
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
V
VDD/2
P0.1
P0.3
P0.5
REF
ADC.3
3
TEMP
ADC.2
= VDD/8 when IREF = 0.
2
Reset Value = 0000 0000B
ADC.1
1
2-0
).
ADC.0
0
2-0
are
171
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