AT90LS2333-4AI Atmel, AT90LS2333-4AI Datasheet - Page 65

• Manufacturer Part Number: AT90LS2333-4AI
• Description: IC MCU 2K 4MHZ A/D LV IT 32TQFP
• Manufacturer: Atmel
• Series: AVR® 90LSr

Specifications of AT90LS2333-4AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 20
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 6 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Table 25. DDCn Effects on Port C Pins
Note:
Port C Schematics
Note that all port pins are synchronized. The synchronization latch is however, not shown in the figure.
Figure 56. Port C Schematic Diagrams (Pins PC0 - PC5)
Port D
Port D is an 8 bit bi-directional I/O port with internal pull-up resistors.
Three I/O memory address locations are allocated for Port D, one each for the Data Register - PORTD, $12($32), Data
Direction Register - DDRD, $11($31) and the Port D Input Pins - PIND, $10($30). The Port D Input Pins address is read
only, while the Data Register and the Data Direction Register are read/write.
The Port D output buffers can sink 20 mA. As inputs, Port D pins that are externally pulled low will source current if the pull-
up resistors are activated.
Some Port D pins have alternate functions as shown in the following table:
DDCn
0
0
1
1
n: 5…0, pin number
PORTCn
0
1
0
1
PCn
PWRDN: POWER DOWN MODE
MOS
PULL-
UP
Output
Output
Input
Input
WP:
WD:
RL:
RP:
RD:
I/O
n:
WRITE PORTC
WRITE DDRC
READ PORTC LATCH
READ PORTC PIN
READ DDRC
0 - 5
PWRDN
Pull Up
Yes
No
No
No
AT90S/LS2333 and AT90S/LS4433
Comment
Tri-state (Hi-Z)
PCn will source current if ext. pulled low.
Push-Pull Zero Output
Push-Pull One Output
RL
RP
TO ADC MUX
Q
Q
PORTCn
RESET
RESET
DDCn
RD
WD
WP
C
C
D
D
ADCn
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