AT89LP3240 Atmel Corporation, AT89LP3240 Datasheet - Page 140

• Manufacturer Part Number: AT89LP3240
• Manufacturer: Atmel Corporation

Specifications of AT89LP3240

• Flash (kbytes): 32 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-1C
• Max I/o Pins: 38
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 153.8
• Sram (kbytes): 4.25
• Eeprom (bytes): 8192
• Self Program Memory: IAP
• Operating Voltage (vcc): 2.4 to 3.6
• Timers: 3
• Isp: SPI/OCD
• Watchdog: Yes

Table 20-5.
140
Symbol
ACON
IREF
DIFF
TRG[1-0]
ACS [2-0]
DADI = DAH
Not Bit Addressable
Bit
AT89LP3240/6440
Function
Analog Input Connect. When cleared, the analog inputs are disconnected from the ADC. When set, the analog inputs
selected by ACS
0
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
DADC Channel Select
DIFF
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
).
DADI
ACON
7
– DADC Input Control Register
TRG0
0
1
0
1
ACS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
2-0
IREF
6
are connected to the ADC. ACON must be zero when changing the input channel multiplexor (ACS
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
0
0
1
1
TRG1
5
ACS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
V+
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P0.0
P0.2
P0.4
P0.6
reserved
reserved
reserved
reserved
TRG0
4
V-
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
VDD/2
P0.1
P0.3
P0.5
P0.7
DIFF
3
ACS2
2
Reset Value = 0000 0000B
ACS1
1
ACS0
3706C–MICRO–2/11
0
2-