PIC16F721-E/SO Microchip Technology, PIC16F721-E/SO Datasheet - Page 93

• Manufacturer Part Number: PIC16F721-E/SO
• Description: 7 KB FLASH, 256 B SRAM, 18 I/O 20 SOIC .300in TUBE
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 16Fr

Specifications of PIC16F721-E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 17
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

REGISTER 12-1:
TABLE 12-1:
 2010 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
INTCON
OPTION_REG
TMR0
TRISA
Legend:
RABPU
R/W-1
Name
– = Unimplemented locations, read as ‘0’, u = unchanged, x = unknown. Shaded cells are not used by the Timer0 module.
RABPU
RABPU: PORTA or PORTB Pull-up Enable bit
1 = PORTA or PORTB pull-ups are disabled
0 = PORTA or PORTB pull-ups are enabled by individual PORT latch values
INTEDG: Interrupt Edge Select bit
1 = Interrupt on rising edge of INT pin
0 = Interrupt on falling edge of INT pin
T0CS: TMR0 Clock Source Select bit
1 = Transition on T0CKI pin
0 = Internal instruction cycle clock (F
T0SE: TMR0 Source Edge Select bit
1 = Increment on high-to-low transition on T0CKI pin
0 = Increment on low-to-high transition on T0CKI pin
PSA: Prescaler Assignment bit
1 = Prescaler is assigned to the WDT
0 = Prescaler is assigned to the Timer0 module
PS<2:0>: Prescaler Rate Select bits
Bit 7
GIE
SUMMARY OF REGISTERS ASSOCIATED WITH TIMER0
—
INTEDG
R/W-1
OPTION_REG: OPTION REGISTER
INTEDG
PEIE
Bit Value
Bit 6
—
000
001
010
011
100
101
110
111
W = Writable bit
‘1’ = Bit is set
R/W-1
T0CS
TMR0IE
TRISA5
T0CS
Bit 5
TMR0 Rate
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
1 : 256
Timer0 module Register
TRISA4
T0SE
Bit 4
INTE
R/W-1
T0SE
WDT R
1 : 1
1 : 2
1 : 4
1 : 8
1 : 16
1 : 32
1 : 64
1 : 128
OSC
RABIE
Bit 3
PSA
—
/4)
ate
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-1
PSA
TMR0IF
TRISA2
Bit 2
PS2
PIC16F/LF720/721
TRISA1
Bit 1
INTF
PS1
R/W-1
PS2
TRISA0
RABIF
Bit 0
PS0
x = Bit is unknown
R/W-1
0000 000x
1111 1111
xxxx xxxx
--11 -111
POR, BOR
PS1
Value on
DS41430A-page 93
0000 000x
1111 1111
uuuu uuuu
--11 -111
R/W-1
Value on
all other
PS0
Resets
bit 0