PIC16F870-I/SP Microchip Technology Inc., PIC16F870-I/SP Datasheet - Page 75

• 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

TABLE 9-8:
FIGURE 9-9:
FIGURE 9-10:
 2003 Microchip Technology Inc.
0Bh, 8Bh,
10Bh,18Bh
0Ch
18h
19h
8Ch
98h
99h
Legend:
Note 1:
RC7/RX/DT pin
RC6/TX/CK pin
(Interrupt Flag)
Address
Note: Sync Master mode; SPBRG = 0. Continuous transmission of two 8-bit words.
TXREG reg
TRMT bit
TXEN bit
TXIF bit
Write to
RC7/RX/DT pin
RC6/TX/CK pin
x = unknown, - = unimplemented, read as '0'. Shaded cells are not used for synchronous master transmission.
Bits PSPIE and PSPIF are reserved on the PIC16F870; always maintain these bits clear.
TXREG Reg
Q1Q2 Q3Q4 Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2 Q3Q4
INTCON
PIR1
RCSTA
TXREG
PIE1
TXSTA
SPBRG
'1'
Name
TRMT bit
TXEN bit
TXIF bit
Write to
Write Word1
REGISTERS ASSOCIATED WITH SYNCHRONOUS MASTER TRANSMISSION
USART Transmit Register
Baud Rate Generator Register
PSPIF
PSPIE
SYNCHRONOUS TRANSMISSION
SYNCHRONOUS TRANSMISSION (THROUGH TXEN)
CSRC
SPEN
Bit 7
GIE
(1)
(1)
bit 0
ADIE
Bit 6
PEIE
ADIF
RX9
TX9
Write Word2
bit 1
Word 1
SREN CREN
TXEN
RCIF
RCIE
Bit 5
T0IE
bit0
SYNC
bit 2
Bit 4
INTE
TXIF
TXIE
bit1
RBIE
Bit 3
—
—
—
—
Q3Q4 Q1Q2 Q3Q4 Q1Q2 Q3Q4 Q1Q2 Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4Q1 Q2Q3 Q4
CCP1IF TMR2IF TMR1IF
CCP1IE TMR2IE TMR1IE
BRGH
FERR
bit 7
Bit 2
T0IF
bit2
OERR
TRMT
bit 0
INTF
Bit 1
Word 2
PIC16F870/871
bit 1
RX9D
TX9D
Bit 0
R0IF
bit6
0000 000x
0000 -000
0000 -00x
0000 0000
0000 -000
0000 -010
0000 0000
POR, BOR
Value on:
bit7
DS30569B-page 73
0000 000u
0000 -000
0000 -00x
0000 0000
0000 -000
0000 -010
0000 0000
Value on
all other
RESETS
bit 7
'1'