Rainbow-electronics AT83C26 Manual de usuario descargar pdf (Pagina 57)

7511B–SCR–10/05

AT83C26

Reset value = 0x X000 0000

Table 39. INTERFACEB ()

7 6 5 4 3 2 1 0

X CARDC82 CARDIO5 CARDIO4

CARDIO3/CAR

DC42

CARDIO2 DEMBOOSTB1 DEMBOOSTB0

Bit Number Bit Mnemonic Description

6 CARDC82

Set this bit to drive the CRST3/CC82 pin High with the on-chip pull-up (according to IODIS2 bit

value). The pin can then be an input (read in STATUSB register).

Clear this bit to drive a low level on the CC82 pin (according to IODIS2 bit value).

5 CARDIO5

Set this bit to drive the CIO5 pin High with the on-chip pull-up when isolated from the host (See

“ITDIS ()” on page 59.). The pin can then be an input (read in STATUSB register).

Clear this bit to drive a low level on the CIO5 pin when isolated from the host.

4 CARDIO4

Set this bit to drive the CIO4 pin High with the on-chip pull-up when isolated from the host (See

“ITDIS ()” on page 59.). The pin can then be an input (read in STATUSB register).

Clear this bit to drive a low level on the CIO4/C45 pin when isolated from the host.

CARDIO3/

CARDC42

Set this bit to drive the CIO3/CC42 pin High with the on-chip pull-up when isolated from the host

(See “ITDIS ()” on page 59.). The pin can then be an input (read in STATUSB register).

Clear this bit to drive a low level on the CIO3/CC42 pin when isolated from the host.

This bit is CIO3 when AUX=0 or when AUX=1 and IFN=2, otherwise it is CC42.

2 CARDIO2

Set this bit to drive the CIO2 pin High with the on-chip pull-up when isolated from the host (See

“ITDIS ()” on page 59.). The pin can then be an input (read in STATUSB register).

Clear this bit to drive a low level on the CIO2 pin when isolated from the host.

1-0 DEMBOOSTB[1-0]

Configuration for DC/DCB startup current.

00: Normal: 80 mA average

01: Normal + 18%

10: Normal + 18% (and boost on oscillator)

11: Normal + 40%

1 2 ... 52 53 54 55 56 57 58 59 60 61 62 ... 76 77

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Rainbow-electronics AT83C26 Manual de usuario Pagina 57