UPSD3234AV-24U1T STMicroelectronics, UPSD3234AV-24U1T Datasheet - Page 36

• Manufacturer Part Number: UPSD3234AV-24U1T
• Description: Flash Programmable System Devices with 8032 Microcontroller Core and 64Kbit SRAM
• Manufacturer: STMicroelectronics

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV
USART Interrupt
–
–
Figure 16. Interrupt System
Table 18. SFR Register
36/170
Addr
SFR
A7
A8
B7
B8
The USART Interrupt is generated by RI
(receive interrupt) OR TI (transmit interrupt).
When the USART Interrupt is generated, the
corresponding request flag must be cleared by
software. The interrupt service routine will
have to check the various USART registers to
Name
Reg
IEA
IPA
IE
IP
EDDC
PDDC
EA
—
7
Interrupt
Sources
USART
Timer
Timer
USART
Timer
INT0
INT1
DDC
USB
I2C
2nd
0
1
2
—
—
—
—
6
ET2
PT2
—
—
5
Bit Register Name
IE /
ES2
PS2
ES
PS
4
Global
Enable
ET1
PT1
–
—
—
3
determine the source and clear the
corresponding flag.
Both USART’s are identical, except for the
additional interrupt controls in the Bit 4 of the
additional interrupt control registers (A7H,
B7H)
IP / IPA Priority
EX1
PX1
—
—
2
EI
PI
ET0
PT0
1
2
2
C
C
High
EUSB
PUSB
EX0
PX0
Low
0
Reset
Value
00
00
00
00
AI06646
Priority (2nd)
Enable (2nd)
Comments
Interrupt
Interrupt
Interrupt
Interrupt
Enable
Priority