SDA5523 Micronas Semiconductor, SDA5523 Datasheet - Page 42
SDA5523
Manufacturer Part Number
SDA5523
Description
SDA55xx TVText Pro
Manufacturer
Micronas Semiconductor
Datasheet
1.SDA5523.pdf
(176 pages)
- Current page: 42 of 176
- Download datasheet (2Mb)
SDA 55xx
2.3.13. Interrupt Nesting
The process whereby a higher-level interrupt request
interrupts a lower-level interrupt service routine is
called “nesting”.
In this case the address of the next instruction in the
lower-priority service routine is pushed onto the stack,
the stack pointer is incremented by two and the micro-
controller will continue the SW program execution from
the memory location of the first instruction of the
higher-level service routine. The last instruction of the
higher-priority interrupt service program must be a
RETI-instruction. This instruction clears the higher ‘pri-
ority-level-active’ flip-flop. The RETI command also
makes that the microcontroller executes the next
instruction of the lower-level interrupt service routine.
Since the lower ‘priority-level-active’ flip-flop has
remained set, higher priority interrupts are re-enabled
while further lower-priority interrupts remain disabled.
2.3.14. External Interrupts
The external interrupt request inputs (INT0 and INT1)
can be programmed for either transition- activated or
level-activated operation. Control of the external inter-
rupts is provided in the TCON register.
Table 2–22: Related register
42
Register Name
TCON
See Section 3. on page 110 for detailed register description.
7
TF1
6
TR1
5
TF0
Sept. 10, 2004; 6251-556-3DS
4
TR0
Bit Name
3
IE1
2
IT1
1
IE0
DATA SHEET
0
IT0
Micronas
Related parts for SDA5523
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Sd Cable Basic Receiver
Manufacturer:
Broadcom Corp.
Datasheet:
Part Number:
Description:
Sd Cable Interactive Receiver With Usb Dvr
Manufacturer:
Broadcom Corp.
Datasheet:
Part Number:
Description:
PNP Digital Transistor
Manufacturer:
Micronas Semiconductor
Datasheet:
Part Number:
Description:
1.0A Iout, 50V Vrrm General Purpose Silicon Rectifier
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
Silicon Epitaxial Planar Diodes
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
150mA Iout, 40V Vrrm Fast Recovery Rectifier
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
Silicon Epitaxial Planar Diodes
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
150mA Iout, 100V Vrrm Fast Recovery Rectifier
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
General Purpose and Switching Diodes in a DO-35 Package
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
Silicon Epitaxial Planar Diode Switches
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
1A Iout, 400V Vrrm Fast Recovery Rectifier
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
3A Iout, 200V Vrrm General Purpose Silicon Rectifier
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
2A Iout, 100V Vrrm Fast Recovery Rectifier
Manufacturer:
Micronas Semiconductor
Part Number:
Description:
Application Circuit
Manufacturer:
Micronas Semiconductor
Datasheet: