PIC17C752 MICROCHIP [Microchip Technology], PIC17C752 Datasheet - Page 66
![no-image](/images/no-image-200.jpg)
PIC17C752
Manufacturer Part Number
PIC17C752
Description
High-Performance 8-Bit CMOS EPROM Microcontrollers
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC17C752.pdf
(320 pages)
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Example 10-1 shows an instruction sequence to initial-
ize PORTA. The Bank Select Register (BSR) must be
selected to Bank 0 for the port to be initialized. The fol-
lowing example uses the MOVLB instruction to load the
BSR register for bank selection.
EXAMPLE 10-1: INITIALIZING PORTA
FIGURE 10-2: RA2 BLOCK DIAGRAM
DS30264A-page 66
Note: I/O pin has protection diodes to V
MOVLB
MOVLW
MOVPF
0
0xF3
PORTA
1
0
D
; Select Bank 0
;
; Initialize PORTA
;
;
;
;
Q
Q
EN
RA<3:2> are output low
RA<5:4> and RA<1:0>
are inputs
(outputs floating)
Q
CK
Peripheral data in
D
I
2
C Mode enable
SS
SCL out
WR_PORTA
.
RD_PORTA
Data Bus
(Q4)
(Q2)
Preliminary
FIGURE 10-3: RA3 BLOCK DIAGRAM
FIGURE 10-4: RA4 AND RA5 BLOCK
Note: I/O pins have protection diodes to V
Note: I/O pin has protection diodes to V
OE = SPEN,SYNC,TXEN, CREN, SREN for RA4
OE = SPEN (SYNC+SYNC,CSRC) for RA5
DIAGRAM
D
Q
Q
EN
1997 Microchip Technology Inc.
“1”
Q
Peripheral data in
CK
Serial port output signals
Serial port input signal
D
SSP Mode
SS
DD
WR_PORTA
SDA out
.
RD_PORTA
RD_PORTA
and V
Data Bus
Data Bus
SS
(Q4)
(Q2)
(Q2)
.
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