AT83EB5114 Atmel Corporation, AT83EB5114 Datasheet - Page 67

• 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

Interrupt System
Figure 31. Interrupt Control System
4311C–8051–02/08
INT1
INT0
ESB1
PWMU0
ESB0
TF0
TF1
PWMU1
ADC
0
1
0
1
IE1
IE0
The AT8xEB5114 has a total of 8 interrupt vectors: two external interrupts (INT0 and
INT1), two timer interrupts (timers 0, 1), serial port interrupt, PWMU0, PWMU1 and A/D.
These interrupts are shown in Figure 31.
Each of the interrupt sources can be individually enabled or disabled by setting or clear-
ing a bit in the Interrupt Enable register (See Table 54). This register also contains a
global disable bit, which must be cleared to disable all interrupts simultaneously.
Each interrupt source can also be individually programmed to one of four priority levels
by setting or clearing a bit in the Interrupt Priority register (See Table 55) and in the
Interrupt Priority High register (See Table 56). Table 53 shows the bit values and priority
levels associated with each combination.
Individual
enable
IPH, IP
disable
Global
0
3
0
3
0
3
0
3
0
3
0
3
0
3
0
3
3
0
Low priority
interrupt
High priority
interrupt
Interrupt
polling
sequence
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