AT83EB5114 Atmel Corporation, AT83EB5114 Datasheet - Page 33

• Manufacturer Part Number: AT83EB5114
• Manufacturer: Atmel Corporation

Specifications of AT83EB5114

• Max. Operating Frequency: 24 MHz
• Cpu: 8051-12C
• Max I/o Pins: 11
• Adc Channels: 6
• Adc Resolution (bits): 10
• Adc Speed (ksps): 50
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Operating Voltage (vcc): 3.0 to 3.6
• Timers: 4
• Mask Rom (kbytes): 4
• Watchdog: Yes

Figure 11. Quasi-Bidirectional Output
Open Drain Output
Configuration
Figure 12. Open Drain Output
Push-Pull Output
Configuration
4311C–8051–02/08
Port latch
Data
Port Latch
Data
The open drain output configuration turns off all pull-ups and only drives the pull-down
transistor of the port driver when the port latch contains a logic 0. To be used as a logic
output, a port configured in this manner must have an external pull-up, typically a resis-
tor tied to V
The open drain port configuration is shown in Figure 12.
The push-pull output configuration has the same pull-down structure as both the open
drain and the quasi-bidirectional 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 13.
Input
Data
2 CPU
CLOCK DELAY
Input
Data
DD
. The pull-down for this mode is the same as the quasi-bidirectional mode.
N
P
N
Strong
AUXR.7
DPU
P
Weak
Pin
P
Medium
Pin
33