PIC16F877A-I/PT Microchip Technology Inc., PIC16F877A-I/PT Datasheet - Page 114

• Manufacturer Part Number: PIC16F877A-I/PT
• Description: 44 PIN, 7 KB FLASH, 368 RAM, 33 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F877A-I/PT

• A/d Inputs: 8-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 33
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 44-pin TQFP
• Programmable Memory: 14K Bytes
• Ram Size: 368 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC16F87X
REGISTER 11-2:
The ADRESH:ADRESL registers contain the 10-bit
result of the A/D conversion. When the A/D conversion
is complete, the result is loaded into this A/D result reg-
ister pair, the GO/DONE bit (ADCON0<2>) is cleared
and the A/D interrupt flag bit ADIF is set. The block dia-
gram of the A/D module is shown in Figure 11-1.
After the A/D module has been configured as desired,
the selected channel must be acquired before the con-
version is started. The analog input channels must
have their corresponding TRIS bits selected as inputs.
DS30292C-page 112
bit 7
bit 6-4
bit 3-0
ADCON1 REGISTER (ADDRESS 9Fh)
A = Analog input
bit 7
ADFM: A/D Result Format Select bit
1 = Right justified. 6 Most Significant bits of ADRESH are read as ‘0’.
0 = Left justified. 6 Least Significant bits of ADRESL are read as ‘0’.
Unimplemented: Read as '0'
PCFG3:PCFG0: A/D Port Configuration Control bits:
Note 1: These channels are not available on PIC16F873/876 devices.
Legend:
R = Readable bit
- n = Value at POR
PCFG3:
PCFG0
0000
0001
0010
0011
0100
0101
011x
1000
1001
1010
1011
1100
1101
1110
1111
ADFM
U-0
2: This column indicates the number of analog channels available as A/D inputs and
AN7
the number of analog channels used as voltage reference inputs.
RE2
A
A
D
D
D
D
D
A
D
D
D
D
D
D
D
(1)
U-0
—
AN6
RE1
D = Digital I/O
D
D
D
D
D
D
D
D
D
D
D
D
A
A
A
(1)
AN5
R/W-0
RE0
A
A
D
D
D
D
D
A
A
A
A
D
D
D
D
—
W = Writable bit
’1’ = Bit is set
(1)
AN4
RA5
A
A
A
A
D
D
D
A
A
A
A
A
D
D
D
U-0
—
To determine sample time, see Section 11.1. After this
acquisition time has elapsed, the A/D conversion can
be started.
V
V
V
V
V
V
V
V
V
AN3
RA3
REF
REF
REF
REF
REF
REF
REF
REF
REF
A
A
A
D
A
D
+
+
+
+
+
+
+
+
+
PCFG3
V
V
V
V
V
AN2
RA2
R/W-0
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
REF
REF
REF
REF
REF
A
A
A
A
D
D
D
A
A
D
-
-
-
-
-
AN1
RA1
A
A
A
A
A
A
D
A
A
A
A
A
A
D
D
PCFG2
R/W-0
AN0
RA0
D
A
A
A
A
A
A
A
A
A
A
A
A
A
A
2001 Microchip Technology Inc.
V
V
RA3
V
RA3
V
RA3
V
RA3
V
RA3
RA3
RA3
RA3
V
RA3
REF
x = Bit is unknown
PCFG1
DD
DD
DD
DD
DD
DD
R/W-0
+
V
RA2
RA2
RA2
RA2
RA2
V
V
V
V
V
V
V
V
V
V
REF
SS
SS
SS
SS
SS
SS
SS
SS
SS
SS
-
PCFG0
R/W-0
Refs
C
HAN
8/0
7/1
5/0
4/1
3/0
2/1
0/0
6/2
6/0
5/1
4/2
3/2
2/2
1/0
1/2
bit 0
(2)
/