datasheetbank_Logo
Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site

ST6200LNA View Datasheet(PDF) - STMicroelectronics

Part Name
Description
View to exact match
ST6200LNA Datasheet PDF : 96 Pages
First Prev 21 22 23 24 25 26 27 28 29 30 Next Last
ST6200CM-Auto/ ST6201CM-Auto/ST6203CM-Auto
6.2 INTERRUPTS
The ST6 core may be interrupted by four maska-
ble interrupt sources, in addition to a Non Maska-
ble Interrupt (NMI) source. The interrupt process-
ing flowchart is shown in Figure 18.
Maskable interrupts must be enabled by setting
the GEN bit in the IOR register. However, even if
they are disabled (GEN bit = 0), interrupt events
are latched and may be processed as soon as the
GEN bit is set.
Each source is associated with a specific Interrupt
Vector, located in Program space (see Table 7). In
the vector location, the user must write a Jump in-
Figure 17. Interrupts Block Diagram
VDD
struction to the associated interrupt service rou-
tine.
When an interrupt source generates an interrupt
request, the PC register is loaded with the address
of the interrupt vector, which then causes a Jump
to the relevant interrupt service routine, thus serv-
icing the interrupt.
Interrupt are triggered by events either on external
pins, or from the on-chip peripherals. Several
events can be ORed on the same interrupt vector.
On-chip peripherals have flag registers to deter-
mine which event triggered the interrupt.
NMI
LATCH
VECTOR #0
CLEARED BY H/W
AT START OF VECTOR #0 ROUTINE
PA1..PA3
I/O PORT REGISTER
“INPUT WITH INTERRUPT”
CONFIGURATION
LATCH
0
CLEARED BY H/W
AT START OF
VECTOR #1 ROUTINE
1
LES BIT
(IOR REGISTER)
VECTOR #1
EXIT FROM
STOP/WAIT
PB0..PB1
PB3
PB5..PB7
I/O PORT REGISTER
“INPUT WITH INTERRUPT”
CONFIGURATION
LATCH
ESB BIT
(IOR REGISTER) CLEARED
BY H/W AT START OF
VECTOR #2 ROUTINE
TMZ BIT
TIMER ETI BIT
(TSCR REGISTER)
A/D
CONVERTER *
EAI BIT
EOC BIT
(ADCR REGISTER)
* Depending on device. See device summary on page 1.
GEN BIT
(IOR REGISTER)
VECTOR #2
VECTOR #3
VECTOR #4
26/96
1
 

Share Link: 

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