AT89C5122D-PSTUM Atmel, AT89C5122D-PSTUM Datasheet - Page 57

• Manufacturer Part Number: AT89C5122D-PSTUM
• Description: IC 8051 MCU FLASH 32K 64QFN
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C5122D-PSTUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: SmartCard, SPI, UART/USART, USB
• Peripherals: LED, POR, WDT
• Number Of I /o: 46
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-QFN
• For Use With: AT89STK-10 - KIT EVAL APPL MASS STORAGEAT89STK-03 - KIT STARTER FOR MCU AT8XC5122/23
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

Input with Weak Pull-down
Configuration
Low Speed Output
Configuration
LED Source Current
4202F–SCR–07/2008
Figure 25. Input with Pull-up
The input with pull-down (input WPD) configuration is shown in Figure 26
Figure 26. Input with Pull-down
The low speed output with low speed t
The current limitation of the LED2CTRL block requires a polarisation current of about
250 μA. This block is automatically disabled in power-down mode.
The low speed output configuration (KB_OUT) is shown in Figure 27.
Figure 27. Low-speed Output
The LED configuration is shown in Figure 28.
Data
Port latch
PCON.1
Input
Data
Input
Data
Stuck to 0 if Medium
Stuck to 0 if Weak
AT83R5122, AT8xC5122/23
FALL
and t
LED2CTRL
PWEAKCTRL
RISE
can drive keyboard.
NMOS
1
Weak
P
N
P
Weak
N
N
P
Weak
Medium
Pin
Pin
Pin
57