AT83C5122_08 ATMEL [ATMEL Corporation], AT83C5122_08 Datasheet - Page 57

• Manufacturer Part Number: AT83C5122_08
• Description: C51 Microcontroller with USB and Smart Card Reader Interfaces
• Manufacturer: ATMEL [ATMEL Corporation]

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