PIC16F870-I/SP Microchip Technology Inc., PIC16F870-I/SP Datasheet - Page 54

• Manufacturer Part Number: PIC16F870-I/SP
• Description: 28 PIN, 7 KB FLASH, 128 RAM, 22 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F870-I/SP

• A/d Inputs: 5-Channel, 10-Bit
• Cpu Speed: 5 MIPS
• Eeprom Memory: 64 Bytes
• Input Output: 22
• Interface: USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 3.5K Bytes
• Ram Size: 128 Bytes
• Speed: 20 MHz
• Timers: 2-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

PIC16F870/871
6.7
TMR1H and TMR1L registers are not reset to 00h on a
POR, or any other RESET, except by the CCP1 special
event trigger.
T1CON register is reset to 00h on a Power-on Reset,
or a Brown-out Reset, which shuts off the timer and
leaves a 1:1 prescale. In all other RESETS, the register
is unaffected.
TABLE 6-2:
DS30569B-page 52
0Bh,8Bh,
10Bh, 18Bh
0Ch
8Ch
0Eh
0Fh
10h
Legend:
Note 1:
Address
Resetting of Timer1 Register Pair
(TMR1H, TMR1L)
Bits PSPIE and PSPIF are reserved on the PIC16F870; always maintain these bits clear.
INTCON
PIR1
PIE1
TMR1L Holding Register for the Least Significant Byte of the 16-bit TMR1 Register
TMR1H Holding Register for the Most Significant Byte of the 16-bit TMR1 Register
T1CON
x = unknown, u = unchanged, - = unimplemented, read as '0'. Shaded cells are not used by the Timer1 module.
Name
REGISTERS ASSOCIATED WITH TIMER1 AS A TIMER/COUNTER
PSPIF
PSPIE
Bit 7
GIE
—
(1)
(1)
PEIE
ADIF
ADIE
Bit 6
—
T1CKPS1 T1CKPS0 T1OSCEN T1SYNC TMR1CS TMR1ON --00 0000 --uu uuuu
RCIF
RCIE
Bit 5
T0IE
INTE
TXIE
Bit 4
TXIF
RBIE
Bit 3
—
—
6.8
The prescaler counter is cleared on writes to the
TMR1H or TMR1L registers.
CCP1IE TMR2IE TMR1IE 0000 -000 0000 -000
CCP1IF TMR2IF TMR1IF 0000 -000 0000 -000
Bit 2
T0IF
Timer1 Prescaler
INTF
Bit 1
 2003 Microchip Technology Inc.
RBIF
Bit 0
0000 000x 0000 000u
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
POR, BOR
Value on:
Value on
RESETS
all other