參數(shù)資料
型號： TUSB3410VF
英文描述： BUS CONTROLLER
中文描述： 總線控制器
文件頁數(shù)： 61/92頁
文件大小： 317K
代理商： TUSB3410VF
9
–
1
9 Interrupts
9.1
8052 Interrupt and Status Registers
All 8052 standard, five interrupt sources are preserved. SIE is the standard interrupt-enable register that controls the
five interrupt sources. All the additional interrupt sources are ORed together to generate EX0. The XINTO signal is
provided to interrupt an external MCU (see Figure 9
–
1).
Table 9
–
1. 8052 Interrupt Location Map
INTERRUPT SOURCE
DESCRIPTION
START ADDRESS
COMMENTS
ES
UART interrupt
0023H
ET1
Timer-1 interrupt
001BH
EX1
External interrupt-1
0013H
ET0
Timer-0 interrupt
000BH
EX0
External interrupt-0
0003H
Used for all internal peripherals
Reset
0000H
9.1.1
8052 Standard Interrupt Enable (SIE) Register
7
6
5
4
3
2
1
0
EA
X
X
ES
ET1
EX1
ET0
EX0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
BIT
0
NAME
EX0
RESET
0
FUNCTION
Enable or disable external interrupt-0
EX0 = 1
EX0 = 1
External interrupt-0 is enabled
External interrupt-0 is disabled
1
ET0
0
Enable or disable timer-0 interrupt
ET0 = 0
ET0 = 1
Timer-0 interrupt is enabled
Timer-0 interrupt is disabled
2
EX1
0
Enable or disable external interrupt-1
EX1 = 0
EX1 = 1
External interrupt-1 is enabled
External interrupt-1 is disabled
3
ET1
0
Enable or disable timer-1 interrupt
ET1 = 0
EX1 = 1
Timer-1 interrupt is enabled
Timer-1 interrupt is disabled
4
ES
0
Enable or disable serial port interrupts
ES = 0
ES = 1
Serial-port interrupt is enabled
Serial-port interrupt is disabled
5, 6
7
RSV
EA
0
0
Reserved
Enable or disable all interrupts (global disable)
EA = 0
EA = 1
Disable all interrupts
Each interrupt source is individually controlled
9.1.2
Additional Interrupt Sources
All nonstandard 8052 interrupts (DMA, I
2
C, etc.) are ORed to generate an internal INT0. Note, the external INT0 is
not used. Furthermore, the INT0 must be programmed as an active low-level interrupt (not edge triggered). A vector
interrupt register is provided to identify all interrupt sources (see
VECINT: vector-interrupt register
). Up to 64 interrupt
vectors are provided. It is the responsibility of the MCU to read the vector and dispatch to the proper interrupt routine.
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