PIC16C770/JW Microchip Technology, PIC16C770/JW Datasheet - Page 51

• Manufacturer Part Number: PIC16C770/JW
• Description: IC MCU EPROM2KX14 A/D PWM 20CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C770/JW

• 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
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: EPROM, UV
• 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
• Package / Case: 20-CDIP (0.300", 7.62mm) Window
• For Use With: DVA16XP200 - ADAPTER ICE 20DIP/SOIC/SSOPAC164028 - MODULE SKT PROMATEII 20SOIC/DIP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

6.2
A crystal oscillator circuit is built in between pins T1OSI
(input) and T1OSO (amplifier output). It is enabled by
setting control bit T1OSCEN (T1CON<3>). The oscilla-
tor is a low power oscillator rated up to 200 kHz. It will
continue to run during SLEEP. It is primarily intended
for a 32 kHz crystal. Table 6-1 shows the capacitor
selection for the Timer1 oscillator.
The Timer1 oscillator is identical to the LP oscillator.
The user must provide a software time delay to ensure
proper oscillator start-up.
TABLE 6-1:
TABLE 6-2:
Note 1: Higher capacitance increases the stability
Address
0Bh,8Bh,
10Bh,18Bh
0Ch
8Ch
0Eh
0Fh
10h
Legend:
Osc Type
2002 Microchip Technology Inc.
These values are for design guidance only.
LP
2: Since each resonator/crystal has its own
Timer1 Oscillator
x = unknown, u = unchanged, - = unimplemented read as ’0’. Shaded cells are not used by the Timer1 module.
of oscillator but also increases the start-up
time.
characteristics, the user should consult the
resonator/crystal manufacturer for appro-
priate values of external components.
Name
INTCON
PIR1
PIE1
TMR1L
TMR1H
T1CON
100 kHz
200 kHz
32 kHz
Freq
CAPACITOR SELECTION FOR
THE TIMER1 OSCILLATOR
REGISTERS ASSOCIATED WITH TIMER1 AS A TIMER/COUNTER
Holding register for the Least Significant Byte of the 16-bit TMR1 register
Holding register for the Most Significant Byte of the 16-bit TMR1 register
Bit 7
GIE
—
—
—
33 pF
15 pF
15 pF
PEIE
ADIF
ADIE
Bit 6
C1
—
T1CKPS1
Bit 5
T0IE
—
—
33 pF
15 pF
15 pF
C2
T1CKPS0
Bit 4
INTE
—
—
T1OSCEN
SSPIF
SSPIE
RBIE
Bit 3
6.3
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/clear-
ing TMR1 interrupt enable bit TMR1IE (PIE1<0>).
6.4
If the ECCP module is configured in Compare mode to
generate a “special event trigger" (CCP1M<3:0> =
1011), this signal will reset Timer1 and start an A/D
conversion (if the A/D module is enabled).
Timer1 must be configured for either timer or Synchro-
nized Counter mode to take advantage of this feature.
If Timer1 is running in Asynchronous Counter mode,
this RESET operation may not work.
In the event that a write to Timer1 coincides with a spe-
cial event trigger from ECCP, the write will take prece-
dence.
In this mode of operation, the CCPR1H:CCPR1L regis-
ters pair effectively becomes the period register for
Timer1.
Note:
PIC16C717/770/771
T1SYNC
CCP1IF
CCP1IE
Bit 2
T0IF
Timer1 Interrupt
Resetting Timer1 using a CCP
Trigger Output
The special event triggers from the CCP1
module will not set interrupt flag bit
TMR1IF (PIR1<0>).
TMR1CS
TMR2IF
TMR2IE
INTF
Bit 1
TMR1ON
TMR1IF
TMR1IE
RBIF
Bit 0
0000 000x 0000 000u
-0-- 0000 -0-- 0000
-0-- 0000 -0-- 0000
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
--00 0000 --uu uuuu
DS41120B-page 49
Value on:
POR,
BOR
Value on
RESETS
all other