ST92T163R4T1 STMicroelectronics, ST92T163R4T1 Datasheet - Page 161
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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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SERIAL COMMUNICATIONS INTERFACE (Cont’d)
8.4.9 Interrupts and DMA
8.4.9.1 Interrupts
The SCI can generate interrupts as a result of sev-
eral conditions. Receiver interrupts include data
pending, receive errors (overrun, framing and par-
ity), as well as address or break pending. Trans-
mitter interrupts are software selectable for either
Transmit Buffer Register Empty (BSN set) or for
Transmit Shift Register Empty (BSN reset) condi-
tions.
Typical usage of the Interrupts generated by the
SCI peripheral are illustrated in Figure 11.
The SCI peripheral is able to generate interrupt re-
quests as a result of a number of events, several
of which share the same interrupt vector. It is
therefore necessary to poll S_ISR, the Interrupt
Status Register, in order to determine the active
ST92163 - SERIAL COMMUNICATIONS INTERFACE (SCI)
trigger. These bits should be reset by the program-
mer during the Interrupt Service routine.
The four major levels of interrupt are encoded in
hardware to provide two bits of the interrupt vector
register, allowing the position of the block of point-
er vectors to be resolved to an 8 byte block size.
The SCI interrupts have an internal priority struc-
ture in order to resolve simultaneous events. Refer
also to Section 0.1.3 for more details relating to
Synchronous mode.
Table 34. SCI Interrupt Internal Priority
Receive DMA Request
Transmit DMA Request
Receive Interrupt
Transmit Interrupt
Highest Priority
Lowest Priority
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