PIC16F88

Manufacturer Part NumberPIC16F88
ManufacturerMicrochip Technology Inc.
PIC16F88 datasheet
 
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PIC16F87/88
TABLE 5-2:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTA
Address
Name
Bit 7
Bit 6
05h
PORTA
RA7
RA6
85h
TRISA
TRISA7 TRISA6 TRISA5
9Fh
ADCON1
ADFM
ADCS2
(4)
9Bh
ANSEL
ANS6
Legend:
x = unknown, u = unchanged, - = unimplemented locations read as ‘0’. Shaded cells are not used by PORTA.
Note 1:
This value applies only to the PIC16F87.
2:
This value applies only to the PIC16F88.
3:
Pin 5 is an input only; the state of the TRISA5 bit has no effect and will always read ‘1’.
4:
PIC16F88 device only.
FIGURE 5-1:
BLOCK DIAGRAM OF RA0/AN0:RA1/AN1 PINS
Data
Bus
D
Q
WR
PORTA
CK
Q
Data Latch
D
Q
WR
TRISA
CK
Q
TRIS Latch
RD TRISA
RD PORTA
To Comparator
To A/D Module Channel Input (PIC16F88 only)
DS30487C-page 52
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
RA5
RA4
RA3
RA2
RA1
(3)
PORTA Data Direction Register
VCFG1
VCFG0
ANS5
ANS4
ANS3
ANS2
ANS1
Analog
Input Mode
Input Buffer
Q
D
EN
Value on
Value on
Bit 0
all other
POR, BOR
Resets
(1)
(1)
RA0
xxxx 0000
uuuu 0000
(2)
(2)
xxx0 0000
uuu0 0000
1111 1111
1111 1111
0000 ----
0000 ----
ANS0
-111 1111
-111 1111
V
DD
V
DD
P
I/O pin
N
V
SS
TTL
 2005 Microchip Technology Inc.