AT83EC5123 ATMEL Corporation, AT83EC5123 Datasheet - Page 14

• Manufacturer Part Number: AT83EC5123
• Description: (AT8xx512x) Smart Card Reader ICs
• Manufacturer: ATMEL Corporation

Push-pull Output
Configuration
Input with Medium or Weak
Pull-up Configuration
14
AT8xC5122/23
Figure 6. Quasi-Bi-directional Output
The push-pull output configuration has the same pull-down structure as both the open
drain and the quasi-bi-directional output modes, but provides a continuous strong pull-
up when the port latch contains a logic 1. The push-pull mode may be used when more
source current is needed from a port output.
The Push-pull port configuration is shown in Figure 7.
Figure 7. Push-pull Output
The input with pull-up (Input MPU and Input WPU) configuration is shown in Figure 8.
Port Latch
Data
DPU (AUXR Reg.)
Port latch
Data
Input
Data
2 CPU
CLOCK DELAY
Input
Data
NMOS
PMOS
N
P
Strong
NMOS
PMOS
N
P
P
Strong
Weak
4202B–SCR–07/03
P
Medium
Pin
Pin