PIC16F946T-I/PT Microchip Technology, PIC16F946T-I/PT Datasheet - Page 89

• Manufacturer Part Number: PIC16F946T-I/PT
• Description: Microcontroller
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F946T-I/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 336 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MA160011 - DAUGHTER BOARD PICDEM LCD 16F91X
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

6.0
The PIC16F946 has a 16-bit timer. Figure 6-1 shows
the basic block diagram of the Timer1 module. Timer1
has the following features:
• 16-bit timer/counter (TMR1H:TMR1L)
• Readable and writable
• Internal or external clock selection
• Synchronous or asynchronous operation
• Interrupt-on-overflow from FFFFh to 0000h
• Wake-up upon overflow (Asynchronous mode)
• Optional external enable input:
• Optional LP oscillator
FIGURE 6-1:
© 2005 Microchip Technology Inc.
- Selectable gate source: T1G or C2 output
- Selectable gate polarity (T1GINV)
Note 1: Timer1 increments on the rising edge.
OSC2/T1OSO
(T1GSS)
CCP1/SEG10
OSC1/T1OSI
F
RC5/T1CKI/
F
OSC
T1OSCEN
OSC
2: ST Buffer is low-power type when using LP oscillator or high-speed type when using T1CKI.
TIMER1 MODULE WITH GATE
CONTROL
= 000
= x00
Set Flag bit
TMR1IF on
Overflow
TIMER1 ON THE PIC16F946 BLOCK DIAGRAM
TMR1H
LP OSC
Clear on special
event trigger
TMR1
(1)
TMR1L
(2)
1
0
Preliminary
Internal
F
T1CS
Clock
OSC
/4
The Timer1 Control register (T1CON), shown in
Register 6-1, is used to enable/disable Timer1 and
select the various features of the Timer1 module.
To C2 Comparator Module
TMR1 Clock
1
0
RC4/T1G/
SDO/SEG11
T1CKPS<1:0>
T1SYNC
Prescaler
1, 2, 4, 8
0
1
2
C2OUT
TMR1ON
T1GE
TMR1ON
T1GE
Synchronized
Clock Input
T1GSS
PIC16F946
Sleep Input
Synchronize
1
0
det
DS41265A-page 87
T1GINV