PIC16C770/P Microchip Technology, PIC16C770/P Datasheet - Page 53

• Manufacturer Part Number: PIC16C770/P
• Description: IC MCU CMOS A/D 2K 20MHZ 20-DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C770/P

• Program Memory Type: OTP
• Program Memory Size: 3.5KB (2K x 14)
• Package / Case: 20-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 15
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 6x12b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Processor Series: PIC16C
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C/SPI/SSP
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 3
• Operating Supply Voltage: 2.5 V to 5.5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: ICE2000
• Minimum Operating Temperature: 0 C
• On-chip Adc: 6-ch x 12-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DVA16XP200 - ADAPTER ICE 20DIP/SOIC/SSOPAC164028 - MODULE SKT PROMATEII 20SOIC/DIP
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

7.0
The Timer2 module timer has the following features:
• 8-bit timer (TMR2 register)
• 8-bit period register (PR2)
• Readable and writable (Both registers)
• Software programmable prescaler (1:1, 1:4, 1:16)
• Software programmable postscaler (1:1 to 1:16)
• Interrupt on TMR2 match of PR2
• SSP module optional use of TMR2 output to gen-
Timer2 has a control register, shown in Register 7-1.
Timer2 can be shut off by clearing control bit TMR2ON
(T2CON<2>) to minimize power consumption.
Figure 7-1 is a simplified block diagram of the Timer2
module.
Additional information on timer modules is available in
the PICmicro™ Mid-Range MCU Family Reference
Manual, (DS33023).
REGISTER 7-1:
2002 Microchip Technology Inc.
erate clock shift
TIMER2 MODULE
bit 7
bit 6-3
bit 2
bit 1-0
TIMER2 CONTROL REGISTER (T2CON1: 12h)
bit 7
Unimplemented: Read as '0'
TOUTPS<3:0>: Timer2 Output Postscale Select bits
0000 = 1:1 Postscale
0001 = 1:2 Postscale
•
•
•
1111 = 1:16 Postscale
TMR2ON: Timer2 On bit
1 = Timer2 is on
0 = Timer2 is off
T2CKPS<1:0>: Timer2 Clock Prescale Select bits
00 = Prescaler is 1
01 = Prescaler is 4
1x = Prescaler is 16
Legend:
R = Readable bit
- n = Value at POR
U-0
—
TOUTPS3 TOUTPS2 TOUTPS1 TOUTPS0 TMR2ON T2CKPS1 T2CKPS0
R/W-0
R/W-0
W = Writable bit
’1’ = Bit is set
R/W-0
7.1
Timer2 can be used as the PWM time-base for PWM
mode of the ECCP module.
The TMR2 register is readable and writable, and is
cleared on any device RESET.
The input clock (F
1:4 or 1:16, selected by control bits T2CKPS<1:0>
(T2CON<1:0>).
The match output of TMR2 goes through a 4-bit
postscaler (which gives a 1:1 to 1:16 scaling inclusive)
to generate a TMR2 interrupt (latched in flag bit
TMR2IF, (PIR1<1>)).
The prescaler and postscaler counters are cleared
when any of the following occurs:
• a write to the TMR2 register
• a write to the T2CON register
• any device RESET (Power-on Reset, MCLR
TMR2 is not cleared when T2CON is written.
Reset, Watchdog Timer Reset, or Brown-out
Reset)
PIC16C717/770/771
Timer2 Operation
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
R/W-0
OSC
R/W-0
/4) has a prescale option of 1:1,
x = Bit is unknown
R/W-0
DS41120B-page 51
R/W-0
bit 0