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AT89LP51RB2 Datasheet(PDF) 68 Page - ATMEL Corporation

Part # AT89LP51RB2
Description  8-bit Microcontroller Compatible with 8051 Products
PDF  254 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

AT89LP51RB2 Datasheet(HTML) 68 Page - ATMEL Corporation

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68
3722A–MICRO–10/11
AT89LP51RB2/RC2/IC2 Preliminary
11.1
Registers
.
.
.
Table 11-1.
KBMOD
– Keyboard Mode Register
KBMOD = 9FH
Reset Value = 0000 0000B
Not Bit Addressable
KBMOD7
KBMOD6
KBMOD5
KBMOD4
KBMOD3
KBMOD2
KBMOD1
KBMOD0
Bit
7
6
543
21
0
KBMOD.x
0 = level-sensitive interrupt for P1.x
1 = edge-triggered interrupt for P1.x
Table 11-2.
KBLS
– Keyboard Level Select Register
KBLS = 9CH
Reset Value = 0000 0000B
Not Bit Addressable
KBLS7
KBLS6
KBLS5
KBLS4
KBLS3KBLS2
KBLS1
KBLS0
Bit
7
6
543
21
0
KBLS.x
0 = detect low level or negative edge on P1.x
1 = detect high level or positive edge on P1.x
Table 11-3.
KBE
– Keyboard Interrupt Enable Register
KBE = 9DH
Reset Value = 0000 0000B
Not Bit Addressable
KBE7
KBE6
KBE5
KBE4
KBE3
KBE2
KBE1
KBE0
Bit
7
6
543
21
0
KBE.x
0 = interrupt for P1.x disabled
1 = interrupt for P1.x enabled
Table 11-4.
KBF
– Keyboard Interrupt Flag Register
KBF = 9EH
Reset Value = 0000 0000B
Not Bit Addressable
KBF7
KBF6
KBF5
KBF4
KBF3
KBF2
KBF1
KBF0
Bit
7
6
543
21
0
KBF.x
0 = interrupt on P1.x inactive
1 = interrupt on P1.x active. Must be cleared by software.



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