Electronic component search and free download site.
Transistors,MosFET ,Diode,Integrated circuits

T89C51RD2-DDFC-L View Datasheet(PDF) - Atmel Corporation

Part Name
Description
Manufacturer
T89C51RD2-DDFC-L
Atmel
Atmel Corporation Atmel
T89C51RD2-DDFC-L Datasheet PDF : 86 Pages
First Prev 31 32 33 34 35 36 37 38 39 40 Next Last
T89C51RD2
6.7. Interrupt System
The T89C51RD2 has a total of 7 interrupt vectors: two external interrupts (INT0 and INT1), three timer interrupts
(timers 0, 1 and 2), the serial port interrupt and the PCA global interrupt. These interrupts are shown in Figure 16.
INT0
TF0
INT1
TF1
PCA IT
RI
TI
TF2
EXF2
IPH, IP
3
IE0
0
3
0
3
IE1
0
3
0
3
0
3
0
3
0
High priority
interrupt
Interrupt
polling
sequence, decreasing
from high to low priority
Individual Enable
Global Disable
Low priority
interrupt
Figure 16. Interrupt Control System
Each of the interrupt sources can be individually enabled or disabled by setting or clearing a bit in the Interrupt
Enable register (See Table 18.). This register also contains a global disable bit, which must be cleared to disable
all interrupts at once.
Each interrupt source can also be individually programmed to one out of four priority levels by setting or clearing
a bit in the Interrupt Priority register (See Table 19.) and in the Interrupt Priority High register (See Table 20.).
shows the bit values and priority levels associated with each combination.
The PCA interrupt vector is located at address 0033H. All other vectors addresses are the same as standard C52
devices.
Rev. F - 15 February, 2001
37
Direct download click here

 

Share Link: 

datasheetq.com  [ Privacy Policy ]Request Datasheet ] [ Contact Us ]