AT89LP6440-20AU Atmel, AT89LP6440-20AU Datasheet - Page 48

• Manufacturer Part Number: AT89LP6440-20AU
• Description: MCU 8051 64K FLASH ISP 44TQFP
• Manufacturer: Atmel
• Series: 89LPr

Specifications of AT89LP6440-20AU

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 38
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 8K x 8
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 2.4 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Package: 44TQFP
• Device Core: 8051
• Family Name: 89LP
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 2.5|3.3 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 38
• Interface Type: 2-Wire/SPI
• On-chip Dac: 8-chx10-bit
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.4
48
Port Alternate Functions
AT89LP6440 - Preliminary
Most general-purpose digital I/O pins of the AT89LP6440 share functionality with the various
I/Os needed for the peripheral units.
Alternate functions are connected to the pins in a logic AND fashion. In order to enable the
alternate function on a port pin, that pin must have a “1” in its corresponding port register bit,
otherwise the input/output will always be “0”. However, alternate functions may be temporarily
forced to “0” by clearing the associated port bit, provided that the pin is not in input-only mode.
Furthermore, each pin must be configured for the correct input/output mode as required by its
peripheral before it may be used as such.
use with an alternate function.
Table 10-5.
Table 10-6.
Port Pin
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P1.0
P1.1
PxM0.y
0
0
1
1
Alternate Function Configurations for Pin y of Port x
Port Pin Alternate Functions
PxM0.y
P0M0.0
P0M0.1
P0M0.2
P0M0.3
P0M0.4
P0M0.5
P0M0.6
P0M0.7
P1M0.0
P1M0.1
Configuration Bits
PxM1.y
0
1
0
1
PxM1.y
P0M1.0
P0M1.1
P0M1.2
P0M1.3
P0M1.4
P0M1.5
P0M1.6
P0M1.7
P1M1.0
P1M1.1
Table 10-6
Table 10-5
Px.y
Alternate
Function
X
1
1
1
lists the alternate functions of the port pins.
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
T2EX
GPI0
GPI1
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
T2
shows how to configure a generic pin for
Notes
Automatic configuration
input-only
Automatic configuration
input-only
Automatic configuration
input-only
Automatic configuration
input-only
Automatic configuration
input-only
Automatic configuration
input-only
Automatic configuration
input-only
Automatic configuration
input-only
I/O Mode
bidirectional (internal pull-up)
output
input
bidirectional (external pull-up)
3706A–MICRO–9/09