參數(shù)資料
型號： ST7FLIT19B
廠商： 意法半導(dǎo)體
英文描述： 8-Bit MCU With Single Voltage Flash Memory, Data EEPROM, ADC, 5 Timers, SPI(內(nèi)部RC,PLL,ADC,ROP,ICP, IAP,SPI的8位MCU)
中文描述： 8位微控制器單電壓閃存存儲(chǔ)器，數(shù)據(jù)EEPROM，模數(shù)轉(zhuǎn)換器，5計(jì)時(shí)器和SPI（內(nèi)部鋼筋，鎖相環(huán)，藝發(fā)局，人事，電感，國際檢察官聯(lián)合會(huì)的SPI的8位微控制器）
文件頁數(shù)： 37/155頁
文件大?。?/td> 2968K
代理商： ST7FLIT19B
ST7LITE1xB
37/155
INTERRUPTS
(Cont’d)
EXTERNAL INTERRUPT CONTROL REGISTER
(EICR)
Read/Write
Reset Value: 0000 0000 (00h)
Bits 7:6 =
IS3[1:0]
ei3 sensitivity
These bits define the interrupt sensitivity for ei3
(Port B0) according to
Table 6
.
Bits 5:4 =
IS2[1:0]
ei2 sensitivity
These bits define the interrupt sensitivity for ei2
(Port B3) according to
Table 6
.
Bits 3:2 =
IS1[1:0]
ei1 sensitivity
These bits define the interrupt sensitivity for ei1
(Port A7) according to
Table 6
.
Bits 1:0 =
IS0[1:0]
ei0 sensitivity
These bits define the interrupt sensitivity for ei0
(Port A0) according to
Table 6
.
Notes:
1. These 8 bits can be written only when the I bit in
the CC register is set.
2. Changing the sensitivity of a particular external
interrupt clears this pending interrupt. This can be
used to clear unwanted pending interrupts. Refer
to section “External Interrupt Function” on
page 47.
Table 6. Interrupt Sensitivity Bits
EXTERNAL INTERRUPT SELECTION REGIS-
TER (EISR)
Read/Write
Reset Value: 0000 1100 (0Ch)
Bits 7:6 =
ei3[1:0]
ei3 pin selection
These bits are written by software. They select the
Port B I/O pin used for the ei3 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
Note:
1. Reset State
Bits 5:4 =
ei2[1:0]
ei2 pin selection
These bits are written by software. They select the
Port B I/O pin used for the ei2 external interrupt ac-
cording to the table below.
External Interrupt I/O pin selection
Notes:
1. Reset State
2. PB4 cannot be used as an external interrupt in
HALT mode.
7
0
IS31
IS30
IS21
IS20
IS11
IS10
IS01
IS00
ISx1 ISx0
External Interrupt Sensitivity
0
0
1
1
0
1
0
1
Falling edge & low level
Rising edge only
Falling edge only
Rising and falling edge
7
0
ei31
ei30
ei21
ei20
ei11
ei10
ei01
ei00
ei31
ei30
I/O Pin
PB0
1)
PB1
PB2
0
0
1
0
1
0
ei21
ei20
I/O Pin
PB3
1)
PB4
2)
PB5
PB6
0
0
1
1
0
1
0
1
1
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