P89V51RB2_09 Datasheet, PDF (56/80 Pages) NXP Semiconductors – 8-bit 80C51 5 V low power 16/32/64 kB flash microcontroller with 1 kB RAM

NXP Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
0
INT0#
IT0
IE0
1
IE and IEA
registers
brownout
IP/IPH/IPA/IPAH
registers
TF0
highest
priority
interrupt
interrupt
polling
sequence
0
INT1#
IT1
IE1
1
TF1
ECF
CF
CCFn
ECCFn
RI
TI
SPIF
SPIE
TF2
EXF2
individual
enables
Fig 27. Interrupt structure
global
disable
lowest
priority
interrupt
002aaa544
Table 44. IEN0 - Interrupt enable register 0 (address A8H) bit allocation
Bit addressable; Reset value: 00H
Bit
7
6
5
4
3
2
1
0
Symbol EA
EC
ET2
ES
ET1
EX1
ET0
EX0
P89V51RB2_RC2_RD2_5
Product data sheet
Rev. 05 — 12 November 2009
© NXP B.V. 2009. All rights reserved.
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