W79E825A Datasheet, PDF (27/127 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E825A/824A/823B/822B Data Sheet
Continued .
BIT NAME
3
KBI.3
2
KBI.2
1
KBI.1
0
KBI.0
FUNCTION
1: Enable P0.3 as a cause of a Keyboard interrupt.
1: Enable P0.2 as a cause of a Keyboard interrupt.
1: Enable P0.1 as a cause of a Keyboard interrupt.
1: Enable P0.0 as a cause of a Keyboard interrupt.
AUX FUNCTION REGISTER 1
Bit: 7
6
5
4
3
2
1
0
KBF
BOD
BOI
LPBOV SRST
ADCEN 0
DPS
Mnemonic: AUXR1
Address: A2h
BIT NAME
FUNCTION
7 KBF
Keyboard Interrupt Flag:
1: When any pin of port 0 that is enabled for the Keyboard Interrupt function goes
low. Must be cleared by software.
6 BOD
Brown Out Disable:
0: Enable Brownout Detect function.
1: Disable Brownout Detect function and save power.
5 BOI
Brown Out Interrupt:
0: Disable Brownout Detect Interrupt function and it will cause chip reset when
BOF is set.
1: This prevents Brownout Detection from causing a chip reset and allows the
Brownout Detect function to be used as an interrupt.
4 LPBOV
Low Power Brown Out Detect control:
0: When BOD is enable, the Brown Out detect is always turned on by normal run
or Power Down mode.
1: When BOD is enable, the Brown Out detect circuit is turned on by Power
Down mode. This control can help save 15/16 of the Brownout circuit power.
When uC is in Power Down mode, the BOD will enable internal RC OSC
(2MHz~0.5MHZ)
3 SRST
Software reset:
1: reset the chip as if a hardware reset occurred.
2 ADCEN
0: Disable ADC circuit.
1: Enable ADC circuit.
10
Reserved.
0 DPS
Dual Data Pointer Select
0: To select DPTR of standard 8051.
1: To select DPTR1
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Publication Release Date: February 21, 2008
Revision A9