ST92F150-EVAL STMicroelectronics, ST92F150-EVAL Datasheet - Page 93
![no-image](/images/manufacturer_photos/0/6/637/stmicroelectronics_sml.jpg)
ST92F150-EVAL
Manufacturer Part Number
ST92F150-EVAL
Description
BOARD EVALUATION FOR ST9 SERIES
Manufacturer
STMicroelectronics
Specifications of ST92F150-EVAL
Processor To Be Evaluated
ST90158 and ST92F1x Daughter Board
Interface Type
I2C
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
497-2905
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 93 of 429
- Download datasheet (8Mb)
The Top Level Interrupt vector is located at ad-
dresses 0004h and 0005h in the segment pointed
to by the Interrupt Segment Register (ISR).
If an external watchdog is used, refer to the Regis-
ter and Memory Map section for details on using
vector locations 0006h to 0009h. Otherwise loc-
tions 0006h to 0007h must contain FFFFh.
With one Interrupt Vector register, it is possible to
address several interrupt service routines; in fact,
peripherals can share the same interrupt vector
register among several interrupt channels. The
most significant bits of the vector are user pro-
grammable to define the base vector address with-
in the vector table, the least significant bits are
controlled by the interrupt module, in hardware, to
select the appropriate vector.
Note: The first 256 locations of the memory seg-
ment pointed to by ISR can contain program code.
5.2.1 Divide by Zero trap
The Divide by Zero trap vector is located at ad-
dresses 0002h and 0003h of each code segment;
it should be noted that for each code segment a
Divide by Zero service routine is required.
Warning. Although the Divide by Zero Trap oper-
ates as an interrupt, the FLAG Register is not
pushed onto the system Stack automatically. As a
result it must be regarded as a subroutine, and the
service routine must end with the RET instruction
(not IRET ).
5.2.2
Routines
The ENCSR bit in the EMR2 register can be used
to select between original ST9 backward compati-
bility mode and ST9+ interrupt management
mode.
ST9 backward compatibility mode (ENCSR = 0)
Segment
Paging
During
Interrupt
If ENCSR is reset, the CPU works in original ST9
compatibility mode. For the duration of the inter-
rupt service routine, ISR is used instead of CSR,
and the interrupt stack frame is identical to that of
the original ST9: only the PC and Flags are
pushed.
This avoids saving the CSR on the stack in the
event of an interrupt, thus ensuring a faster inter-
rupt response time.
It is not possible for an interrupt service routine to
perform inter-segment calls or jumps: these in-
structions would update the CSR, which, in this
case, is not used (ISR is used instead). The code
segment size for all interrupt service routines is
thus limited to 64K bytes.
ST9+ mode (ENCSR = 1)
If ENCSR is set, ISR is only used to point to the in-
terrupt vector table and to initialize the CSR at the
beginning of the interrupt service routine: the old
CSR is pushed onto the stack together with the PC
and flags, and CSR is then loaded with the con-
tents of ISR.
In this case, iret will also restore CSR from the
stack. This approach allows interrupt service rou-
tines to access the entire 4 Mbytes of address
space. The drawback is that the interrupt response
time is slightly increased, because of the need to
also save CSR on the stack.
Full compatibility with the original ST9 is lost in this
case, because the interrupt stack frame is differ-
ent.
ENCSR Bit
Mode
Pushed/Popped
Registers
Max. Code Size
for interrupt
service routine
ST92F124/F150/F250 - INTERRUPTS
Within 1 segment
ST9 Compatible
PC, FLAGR
64KB
0
Across segments
PC, FLAGR,
No limit
ST9+
CSR
1
93/429
9
Related parts for ST92F150-EVAL
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ST92F150-EPB/US](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
BOARD PROGRAM FOR ST92F150 MCU
Manufacturer:
STMicroelectronics
Datasheet:
![ST92F150-EMU2](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
BOARD EMULATOR FOR ST9 SERIES
Manufacturer:
STMicroelectronics
Datasheet:
![ST92F150-DBE](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
MCU, MPU & DSP Development Tools ST9 Dedication Board
Manufacturer:
STMicroelectronics
Datasheet:
![HCF4040BF](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
STMicroelectronics [RIPPLE-CARRY BINARY COUNTER/DIVIDERS]
Manufacturer:
STMicroelectronics
Datasheet:
![HCF4054BF](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
STMicroelectronics [LIQUID-CRYSTAL DISPLAY DRIVERS]
Manufacturer:
STMicroelectronics
Datasheet:
![STEVAL-MKI062V2](/photos/28/39/283999/steval-mki062v2_tmb.jpg)
Part Number:
Description:
BOARD EVAL FOR MEMS SENSORS
Manufacturer:
STMicroelectronics
Datasheet:
![BUT32V](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
NPN TRANSISTOR POWER MODULE
Manufacturer:
STMicroelectronics
Datasheet:
![STTA12006TV2](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
TURBOSWITCH ULTRA-FAST HIGH VOLTAGE DIODE
Manufacturer:
STMicroelectronics
Datasheet:
![E110NS20FD](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
Manufacturer:
STMicroelectronics
Datasheet:
![MDS50-800](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
DIODE / SCR MODULE
Manufacturer:
STMicroelectronics
Datasheet:
![MDS35-800](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
DIODE / SCR MODULE
Manufacturer:
STMicroelectronics
Datasheet:
![E16N100](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
Search -----> STE16N100
Manufacturer:
STMicroelectronics
Datasheet: