Samsung 8-Bit Manuale Utente Scaricare il pdf (Pagina 81)

S3C9228/P9228 CONTROL REGISTERS

4-29

P4CONL–Port 4 Control Register Low Byte FAH

Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0

RESETRESET Value

0 0 0 0 0 0 0 0

Read/Write

R/W R/W R/W R/W R/W R/W R/W R/W

.7-.6

P4.3/SEG7 Configuration Bits

0 0 Input mode

0 1 Push-pull output

1 0 N-channel open-drain output

1 1 Input, pull-up mode

.5-.4

P4.2/SEG6 Configuration Bits

0 0 Input mode

0 1 Push-pull output

1 0 N-channel open-drain output

1 1 Input, pull-up mode

.3-.2

P4.1/SEG5 Configuration Bits

0 0 Input mode

0 1 Push-pull output

1 0 N-channel open-drain output

1 1 Input, pull-up mode

.1-.0

P4.0/SEG4 Configuration Bits

0 0 Input mode

0 1 Push-pull output

1 0 N-channel open-drain output

1 1 Input, pull-up mode

1 2 ... 76 77 78 79 80 81 82 83 84 85 86 ... 461 462

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