參數(shù)資料
型號: P83CL882
廠商: NXP Semiconductors N.V.
英文描述: 80C51 Ultra Low Power ULP telephony controller
中文描述: 80C51的超低功耗無鉛汽油電話控制器
文件頁數(shù): 28/88頁
文件大?。?/td> 328K
代理商: P83CL882
2001 Jun 19
28
Philips Semiconductors
Product specification
80C51 Ultra Low Power (ULP) telephony controller
P83CL882
6.3.11.2
Interrupt Sensitivity Register 1 (ISE1)
Writing either a logic 1 or logic 0 to an Interrupt Sensitivity Register bit sets the type of the corresponding external
interrupt to edge sensitive (logic 1) or level sensitive (logic 0).
Table 32
Interrupt Sensitivity Register 1 (SFR address E1H)
Table 33
Description of ISE1 bits
6.3.11.3
Interrupt polarity and sensitivity options
Table 34
Interrupt polarity and sensitivity options
‘n’ denotes the bit position in the SFRs IX1 and ISE1.
7
6
5
4
3
2
1
0
ISE9
ISE8
ISE7
ISE6
ISE5
ISE4
ISE3
ISE2
BIT
SYMBOL
DESCRIPTION
7 to 0
ISE9 to ISE2 external interrupt 9 to 2 sensitivity
IX1.n
ISE1.n
DESCRIPTION
0
1
0
1
0
0
1
1
LOW-level sensitive
HIGH-level sensitive
falling edge sensitive
rising edge sensitive
MGT290
P1.n
PORT1
ISE1.n
IX1.n
negative
level
positive
edge
IRQ1.n
IEN1.n
positive
level
negative
edge
Fig.13 Polarity and sensitivity of Port 1 interrupts.
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