ST92T163R4T1 STMicroelectronics, ST92T163R4T1 Datasheet - Page 46
ST92T163R4T1
Manufacturer Part Number
ST92T163R4T1
Description
Microcontrollers (MCU) OTP EPROM 20K USB/I2
Manufacturer
STMicroelectronics
Datasheet
1.ST92T163R4T1.pdf
(224 pages)
Specifications of ST92T163R4T1
Data Bus Width
8 bit, 16 bit
Program Memory Type
EPROM
Program Memory Size
20 KB
Data Ram Size
2 KB
Interface Type
I2C, SCI, USB
Maximum Clock Frequency
24 MHz
Number Of Programmable I/os
64
Number Of Timers
2
Operating Supply Voltage
4 V to 5.5 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Package / Case
TQFP-64
Minimum Operating Temperature
0 C
On-chip Adc
8 bit
Lead Free Status / Rohs Status
No
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ST92163 - INTERRUPTS
3 INTERRUPTS
3.1 INTRODUCTION
The ST9 responds to peripheral and external
events through its interrupt channels. Current pro-
gram execution can be suspended to allow the
ST9 to execute a specific response routine when
such an event occurs, providing that interrupts
have been enabled, and according to a priority
mechanism. If an event generates a valid interrupt
request, the current program status is saved and
control passes to the appropriate Interrupt Service
Routine.
The ST9 CPU can receive requests from the fol-
lowing sources:
– On-chip peripherals
– External pins
– Top-Level Pseudo-non-maskable interrupt
According to the on-chip peripheral features, an
event occurrence can generate an Interrupt re-
quest which depends on the selected mode.
Up to eight external interrupt channels, with pro-
grammable input trigger edge, are available. In ad-
dition, a dedicated interrupt channel, set to the
Top-level priority, can be devoted either to the ex-
ternal NMI pin (where available) to provide a Non-
Maskable Interrupt, or to the Timer/Watchdog. In-
46/224
terrupt service routines are addressed through a
vector table mapped in Memory.
Figure 19. Interrupt Response
INTERRUPT
PROGRAM
NORMAL
FLOW
INSTRUCTION
PENDING BIT
INTERRUPT
SERVICE
ROUTINE
CLEAR
IRET
VR001833
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