參數(shù)資料
型號(hào)： P87C51RA2
廠商： NXP Semiconductors N.V.
英文描述： 80C51 8-bit microcontroller family
中文描述： 80C51的8位單片機(jī)系列
文件頁(yè)數(shù)： 13/34頁(yè)
文件大?。?/td> 394K
代理商： P87C51RA2
2001 Apr 06
13
Philips Semiconductors
Preliminary specification
P87C51MB2/P87C51MC2
80C51 8-bit microcontroller family with extended memory
64KB/96KB OTP with 2KB/3KB RAM
FUNCTIONAL DESCRIPTION
The following paragraphs briefly describe the features of the P87C51Mx2. For more detailed information, please refer to the
P87C51Mx2 User Manual or the 51MX Architecture Reference.
INTERRUPTS
Table 1 summarizes the interrupt sources, flag bits, vector addresses, enable bits, priority bits, polling priority, and whether each
interrupt may wake up the CPU from Power Down mode.
Description
Interrupt
Flag Bit(s)
IE0
TF0
IE1
TF1
TI_0 & RI_0
5
RI_0
5
TF2, EXF2
CF, CCFn*
TI_1 & RI_1
6
RI_1
6
TI_0
TI_1
SPI
Vector
Address
0003h
000Bh
0013h
001Bh
Interrupt
Enable Bit(s)
EX0 (IEN0.0)
ET0 (IEN0.1)
EX1 (IEN0.2)
ET1 (IEN0.3)
Interrupt
Priority
IP0H.0, IP0.0
IP0H.1, IP0.1
IP0H.2, IP0.2
IP0H.3, IP0.3
Polling
Priority
1 (highest)
2
3
4
Power Down
Wakeup
Yes
No
Yes
No
External Interrupt 0
Timer 0 Interrupt
External Interrupt 1
Timer 1 Interrupt
Serial Port 0 Tx and Rx
1,5
Serial Port 0 Rx
1,5
Timer 2 Interrupt
PCA interrupt
Serial Port 1 Tx and Rx
2,6
Serial Port 1 Rx
2,6
Serial Port 0 Tx
3
Serial Port 1 Tx
4
SPI Interrupt
0023h
ES0(IEN0.4)
IP0H.4, IP0.4
6
No
002Bh
0033h
ET2 (IEN0.5)
EC (IEN0.6)
IP0H.5, IP0.5
IP0H.6, IP0.6
7
5
No
No
0053h
ES1 (IEN1.0)
IP1H.0, IP1.0
11
No
003Bh
0043h
004Bh
005Bh
0063h
006Bh
0073h
EI10 (IEN1.1)
EI11 (IEN1.2)
EI11 (IEN1.3)
EI12 (IEN1.4)
EI13 (IEN1.5)
EI13 (IEN1.6)
EI14 (IEN1.7)
IP1H.1, IP1.1
IP1H.2, IP1.2
IP1H.3, IP1.3
IP1H.4, IP1.4
IP1H.5, IP1.5
IP1H.6, IP1.6
IP1H.7, IP1.7
8
9
No
No
No
No
No
No
No
10
12
13
14
Reserved
15 (lowest)
1. S0STAT.5 = 0 selects combined Serial Port 0 Tx and Rx interrupt; S0STAT.5 = 1 selects Serial Port 0 Rx interrupt only (and
TX interrupt will be different, see Note 3 below).
2. S1STAT.5 = 0 selects combined Serial Port 1 Tx and Rx interrupt; S1STAT.5 = 1 selects Serial Port 1 Rx interrupt only (and
TX interrupt will be different, see Note 4 below).
3. This interrupt is used as Serial Port 0 Tx interrupt if and only if S0STAT.5 = 1, and is disabled otherwise.
4. This interrupt is used as Serial Port 1 Tx interrupt if and only if S1STAT.5 = 1, and is disabled otherwise.
5. If S0STAT.0 = 1, the following Serial Port 0 additional flag bits can cause this interrupt: FE_0, BR_0, OE_0.
6. If S1STAT.0 = 1, the following Serial Port 1 additional flag bits can cause this interrupt: FE_1, BR_1, OE_1.
Table 1: Summary of Interrupts
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P87C51RA-24 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller
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