PIC16LC923-04/PT Microchip Technology, PIC16LC923-04/PT Datasheet - Page 51

• Manufacturer Part Number: PIC16LC923-04/PT
• Description: IC MCU OTP 4KX14 LCD DVR 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16LC923-04/PT

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: I²C, SPI
• Peripherals: LCD, POR, PWM, WDT
• Number Of I /o: 25
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: OTP
• Ram Size: 176 x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 6 V
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

8.0
Timer1 is a 16-bit timer/counter consisting of two 8-bit
registers (TMR1H and TMR1L) which are readable and
writable. The TMR1 Register pair (TMR1H:TMR1L)
increments from 0000h to FFFFh and rolls over to
0000h. The TMR1 Interrupt, if enabled, is generated on
overflow which is latched in interrupt flag bit TMR1IF
(PIR1<0>). This interrupt can be enabled/disabled by
setting/clearing TMR1 interrupt enable bit TMR1IE
(PIE1<0>).
Timer1 can operate in one of two modes:
• As a timer
• As a counter
The operating mode is determined by the clock select
bit, TMR1CS (T1CON<1>).
In timer mode, Timer1 increments every instruction
cycle. In counter mode, it increments on every rising
edge of the external clock input.
FIGURE 8-1: T1CON: TIMER1 CONTROL REGISTER (ADDRESS 10h)
1997 Microchip Technology Inc.
bit7
bit 7-6: Unimplemented: Read as '0'
bit 5-4: T1CKPS1:T1CKPS0: Timer1 Input Clock Prescale Select bits
bit 3:
bit 2:
bit 1:
bit 0:
U-0
—
TIMER1 MODULE
11 = 1:8 Prescale value
10 = 1:4 Prescale value
01 = 1:2 Prescale value
00 = 1:1 Prescale value
T1OSCEN: Timer1 Oscillator Enable Control bit
1 = Oscillator is enabled
0 = Oscillator is shut off
Note: The oscillator inverter and feedback resistor are turned off to eliminate power drain
T1SYNC: Timer1 External Clock Input Synchronization Control bit
TMR1CS = 1
1 = Do not synchronize external clock input
0 = Synchronize external clock input
TMR1CS = 0
This bit is ignored. Timer1 uses the internal clock when TMR1CS = 0.
TMR1CS: Timer1 Clock Source Select bit
1 = External clock from pin T1CKI (on the rising edge)
0 = Internal clock (Fosc/4)
TMR1ON: Timer1 On bit
1 = Enables Timer1
0 = Stops Timer1
U-0
—
T1CKPS1 T1CKPS0 T1OSCEN T1SYNC
R/W-0
R/W-0
R/W-0
R/W-0
Timer1 can be turned on and off using the control bit
TMR1ON (T1CON<0>).
Timer1 also has an internal “reset input”. This reset can
be generated by the CCP module (Section 10.0).
Figure 8-1 shows the Timer1 control register.
When the Timer1 oscillator is enabled (T1OSCEN is
set), the RC1/T1OSI and RC0/T1OSO/T1CKI pins
become inputs.
TMR1CS TMR1ON
R/W-0
R/W-0
bit0
R = Readable bit
W = Writable bit
U = Unimplemented bit,
- n = Value at POR reset
PIC16C9XX
read as ‘0’
DS30444E - page 51