Maxim-integrated MAXQ622 Manual do Utilizador descarregar pdf (Página 111)

MAXQ612/MAXQ622 User’s Guide

Maxim Integrated 6-9

Bits 5:0: Input/Output Direction for Port 5. The bits in this register control the input/output direction for port pins P5.0

to P5.7. When PD5.n is set to 0, the corresponding port pin (P5.n) acts as an input with characteristics determined by

PO5.n. When PD5.n is set to 1, the port pin acts as an output, driving the output state given by PO5.n.

Bits 7:0: Input/Output Direction for Port 6. The bits in this register control the input/output direction for port pins P6.0

to P6.7. When PD6.n is set to 0, the corresponding port pin (P6.n) acts as an input with characteristics determined by

PO6.n. When PD6.n is set to 1, the port pin acts as an output, driving the output state given by PO6.n.

6.1.1 Port Pin Example 1: Driving Outputs on Port 0

move PO0, #000h ; Set all outputs low

move PD0, #0FFh ; Set all P0 pins to output mode

6.1.2 Port Pin Example 2: Receiving Inputs on Port 1

move PO1, #0FFh ; Set weak pullups ON on all pins

move PD1, #000h ; Set all P1 pins to input mode

nop ; Wait for external source to drive P1 pins

move Acc, PI1 ; Get input values from P1 (will return FF if

; no other source drives the pins low)

PD5

Port 5 Direction Register

M1[11h]

PD6

Port 6 Direction Register

M1[12h]

Bit # 7 6 5 4 3 2 1 0

Name PD5.7 PD5.6 PD5.5 PD5.4 PD5.3 PD5.2 PD5.1 PD5.0

Reset s s s s s s s s

Access rw rw rw rw rw rw rw rw

Bit # 7 6 5 4 3 2 1 0

Name PD6.7 PD6.6 PD6.5 PD6.4 PD6.3 PD6.2 PD6.1 PD6.0

Reset s s s s s s s s

Access rw rw rw rw rw rw rw rw

1 2 ... 106 107 108 109 110 111 112 113 114 115 116 ... 254 255

Sem comentários

Maxim-integrated MAXQ622 Manual do Utilizador Página 111